Fault interpretation

DF001 PRESENT

COOLANT TEMPERATURE SENSOR CIRCUIT 1. DEF: Value out of tolerance

INSTRUCTIONS

Nothing to report.

Check the coolant temperature sensor and its connector for cleanliness and condition.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following connections: ECU pin F2, connector B → Coolant temperature sensor ECU pin F4, connector B → Coolant temperature sensor (see the connector pin numbers in the corresponding wiring diagram)

Check the resistance of the coolant temperature sensor (see the values in the "Help" chapter). If the values are not correct, replace the coolant temperature sensor.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF002 PRESENT

AIR TEMPERATURE SENSOR CIRCUIT 1. DEF: Value out of tolerance

INSTRUCTIONS

Nothing to report.

Check the cleanliness and condition of the air temperature sensor and its connector.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following connections: ECU pin E3, connector B → Air temperature sensor ECU pin E2, connector B → Air temperature sensor (see the connector pin numbers in the corresponding wiring diagram)

Check the air temperature sensor resistance (see the values in the "Help" chapter). If the values are not within specification, replace the air temperature sensor.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF005 PRESENT OR STORED

ENGINE SPEED SENSOR CIRCUIT 1.DEF: Flywheel target fault 2.DEF: No engine speed signal or noisy engine speed signal

INSTRUCTIONS

Conditions for applying the diagnosis for a stored fault:

The fault is declared present after the starter motor has operated for 10 seconds or engine speed is above 600 rpm.

1.DEF	Check the cleanliness and condition of the flywheel.
	If the flywheel has been replaced or removed, it is necessary to reset the flywheel target learning, then carry out the learning procedure.
	Learning reset: Run command RZ005 Flywheel signal learning procedure: Accelerate to 4000 rpm in third gear, then decelerate with the accelerator released (fuel cut-off) until engine re-engagement*. Carry out the procedure twice in succession. In rare cases, fault DF125 may appear. (*This is the point where, during a deceleration with the accelerator released, the engine drops to idle speed and regains torque.)
2.DEF	Check the mounting and position of the engine speed sensor (refer to the Repair Manual, relevant chapter).
	Check the cleanliness and condition of the engine speed sensor and its connector. Check the condition of the cable.
	Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following connections: ECU pin E4, connector B → Engine speed sensor ECU pin F3, connector B → Engine speed sensor (See the connector pin numbers in the relevant wiring diagram.) Check the engine speed sensor resistance (see the value in the "Help" chapter). If the value is not within specification, replace the engine speed sensor.
	If the engine speed sensor has been replaced, it is necessary to reset the flywheel target learning, then carry out the learning procedure.
	Flywheel signal learning procedure: Accelerate to 4000 rpm in third gear, then decelerate with the accelerator released (fuel cut-off) until engine re-engagement*. Carry out the procedure twice in succession. In rare cases, fault DF125 may appear. (*This is the point where, during a deceleration with the accelerator released, the engine drops to idle speed and regains torque.)

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF008 PRESENT OR STORED

ACCELERATOR PEDAL POTENTIOMETER TRACK 1 CIRCUIT CO.0: Open circuit or short to ground CC.1: Short to +12 V 1.DEF: Inconsistency between accelerator pedal track 1 and track 2

INSTRUCTIONS

Diagnostic application conditions on stored fault: The fault is declared present following a change in the accelerator pedal from released to fully depressed.

Check that the accelerator pedal is not mechanically seized.

Check the cleanliness and condition of the accelerator pedal potentiometer and its connector.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following connections: ECU pin H3, connector A → Accelerator pedal potentiometer track 1 ECU pin G2, connector A → Accelerator pedal potentiometer track 1 ECU pin H2, connector A → Accelerator pedal potentiometer track 1 (see the connector pin numbers in the corresponding wiring diagram)

If fault DF011 is present or stored, troubleshoot that fault.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF009 PRESENT OR STORED

ACCELERATOR PEDAL POTENTIOMETER TRACK 2 CIRCUIT CO.0: Open circuit or short to ground CC.1: Short to +12 V

INSTRUCTIONS

Diagnostic application conditions on stored fault: The fault is declared present following a change in the accelerator pedal from released to fully depressed.

Check that the accelerator pedal is not mechanically seized.

Check the cleanliness and condition of the accelerator pedal potentiometer and its connector.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following connections: ECU pin F4, connector A → Accelerator pedal potentiometer track 2 ECU pin F2, connector A → Accelerator pedal potentiometer track 2 ECU pin F3, connector A → Accelerator pedal potentiometer track 2 (see the connector pin numbers in the corresponding wiring diagram)

If fault DF012 is present or stored, troubleshoot that fault.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF011 PRESENT

SENSOR POWER SUPPLY NO. 1 VOLTAGE 1.DEF: Voltage out of tolerance 2.DEF: Internal electronic fault If multiple faults are present, troubleshoot the other faults first

INSTRUCTIONS

Nothing to report.

Check the cleanliness and condition of the throttle body connector.

Check the cleanliness and condition of the accelerator pedal potentiometer connector.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following connections: ECU pin G2, connector B → Throttle body ECU pin G2, connector A → Accelerator pedal potentiometer track 1 (see the connector pin numbers in the corresponding wiring diagram)

If the problem is not resolved, there is an ECU fault. Contact Techline.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF012 PRESENT

SENSOR SUPPLY VOLTAGE NO. 2 1.DEF: Voltage out of tolerance 2.DEF: Internal electronic fault If multiple faults are present, troubleshoot the other faults first

INSTRUCTIONS

Nothing to report.

Check the cleanliness and condition of the accelerator pedal potentiometer connector.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following link: ECU pin F2, connector A → Accelerator pedal potentiometer track 2 (See the connector pin number in the relevant wiring diagram.)

If the problem is not resolved, there is an ECU fault. Contact Techline.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF026 PRESENT OR STORED

CYLINDER 1 INJECTOR CONTROL CIRCUIT CO: Open circuit CC.0: Short to ground CC.1: Short to +12 V

INSTRUCTIONS

If faults DF084 or DF046 are present or stored, troubleshoot them first.

Diagnostic application conditions on stored fault: The fault is declared present following a 10-second delay with the engine running.

WARNING: After repair, the fault may still be displayed as present.

Check the cleanliness and condition of the cylinder 1 injector and its connector.

With ignition on, check for +12 V at the cylinder 1 injector connector (see the connector pin number in the relevant wiring diagram). If there is no +12 V: disconnect the battery, disconnect connector PPM1 at the Protection and Switching Unit, check the cleanliness and condition of the connector, using the "Universal breakout box", check the continuity of the following link: Protection and Switching Unit connector PPM1 pin 1 → Cylinder 1 injector

Reconnect the Protection and Switching Unit connector and reconnect the battery. If there is still no +12 V with ignition on at the cylinder 1 injector connector, there is a fault in the Protection and Switching Unit. Contact Techline.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following link: Injection ECU pin A1, connector B → Cylinder 1 injector (See the connector pin number in the relevant wiring diagram.)

Check the cylinder 1 injector resistance (see the value in the "Help" chapter). If the value is not within specification, replace the cylinder 1 injector.

If the problem persists, replace the cylinder 1 injector.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF027 PRESENT OR STORED

CYLINDER 2 INJECTOR CONTROL CIRCUIT CO: Open circuit CC.0: Short to ground CC.1: Short to +12 V

INSTRUCTIONS

If faults DF084 or DF046 are present or stored, troubleshoot them first.

Diagnostic application conditions on stored fault: The fault is declared present following a 10-second delay with the engine running.

WARNING: After repair, the fault may still be displayed as present.

Check the cleanliness and condition of the cylinder 2 injector and its connector.

With the ignition on, check for +12 V at the cylinder 2 injector connector (see the connector pin number in the corresponding wiring diagram). If there is no +12 V: disconnect the battery, disconnect connector PPM1 from the Protection and Switching Unit, check the cleanliness and condition of the connector, using the "Universal breakout box", check the continuity of the following link: Protection and Switching Unit connector PPM1 pin 1 → Cylinder 2 injector

Reconnect the Protection and Switching Unit connector and reconnect the battery. If there is still no +12 V at the cylinder 2 injector connector with the ignition on, there is a fault in the Protection and Switching Unit. Contact Techline.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following link: Injection ECU pin A2, connector B → Cylinder 2 injector (See the connector pin number in the relevant wiring diagram.)

Check the resistance of the cylinder 2 injector (see the value in the "Help" section). If the value is not within specification, replace the cylinder 2 injector.

If the fault persists, replace the cylinder 2 injector.

If the fault is still not resolved, deal with the other faults, then go to the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF028 PRESENT OR STORED

CYLINDER 3 INJECTOR CONTROL CIRCUIT CO: Open circuit CC.0: Short to ground CC.1: Short to +12 V

INSTRUCTIONS

If faults DF084 or DF046 are present or stored, troubleshoot them first.

Diagnostic application conditions on stored fault: The fault is declared present following a 10-second delay with the engine running.

WARNING: After repair, the fault may still be displayed as present.

Check the cleanliness and condition of the cylinder 3 injector and its connector.

With the ignition on, check for +12 V at the cylinder 3 injector connector (see the connector pin number in the corresponding wiring diagram). If there is no +12 V: Disconnect the battery. disconnect connector PPM1 from the Protection and Switching Unit, check the cleanliness and condition of the connector, using the "Universal breakout box", check the continuity of the following link: Protection and Switching Unit connector PPM1 pin 1 → Cylinder 3 injector

Reconnect the Protection and Switching Unit connector and reconnect the battery. If there is still no +12 V at the cylinder 3 injector connector with the ignition on, there is a fault in the Protection and Switching Unit. Contact Techline.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following link: Injection ECU pin A3, connector B → Cylinder 3 injector (See the connector pin number in the corresponding wiring diagram)

Check the resistance of the cylinder 3 injector (see the value in the "Help" section). If the value is not within specification, replace the cylinder 3 injector.

If the fault persists, replace the cylinder 3 injector.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF029 PRESENT OR STORED

CYLINDER 4 INJECTOR CONTROL CIRCUIT CO: Open circuit CC.0: Short to ground CC.1: Short to +12 V

INSTRUCTIONS

If faults DF084 or DF046 are present or stored, troubleshoot them first.

Diagnostic application conditions on stored fault: The fault is declared present following a 10-second delay with the engine running.

WARNING: After repair, the fault may still be displayed as present.

Check the cleanliness and condition of the cylinder 4 injector and its connector.

With the ignition on, check for +12 V at the cylinder 4 injector connector (see the connector pin number in the corresponding wiring diagram). If there is no +12 V: disconnect the battery, disconnect connector PPM1 from the Protection and Switching Unit, check the cleanliness and condition of the connector, using the "Universal breakout box", check the continuity of the following link: Protection and Switching Unit connector PPM1 pin 1 → Cylinder 4 injector

Reconnect the Protection and Switching Unit connector and reconnect the battery. If there is still no +12 V at the cylinder 4 injector connector with the ignition on, there is a fault in the Protection and Switching Unit. Contact Techline.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Using the "Universal breakout box", check the insulation and continuity of the following link: Injection ECU pin A4, connector B → Cylinder 4 injector (See the connector pin number in the relevant wiring diagram.)

Check the resistance of the cylinder 4 injector (see the value in the "Help" section). If the value is not within specification, replace the cylinder 4 injector.

If the fault persists, replace the cylinder 4 injector.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF037 PRESENT OR STORED

IMMOBILISER 1.DEF: CAN link fault

INSTRUCTIONS

Nothing to report.

Carry out a multiplexed network test. Refer to the "Multiplex network" section in the Repair Manual.

If the fault is not resolved, carry out a diagnosis of the "Immobiliser" system. Refer to the "Immobiliser" section in the Repair Manual.

AFTER REPAIR

Deal with any other faults.

Clear the stored faults.

DF038 PRESENT

CONTROL UNIT 1.DEF: Internal electronic fault

INSTRUCTIONS

Nothing to report.

Contact Techline.

AFTER REPAIR

If the ECU has been replaced, carry out a road test and use the diagnostic tool to check that there are no FAULTS and that the STATES and PARAMETERS are correct.

DF046 PRESENT OR STORED

BATTERY VOLTAGE 1.DEF: Incorrect battery voltage

INSTRUCTIONS

If fault DF084 is present or stored, deal with it first.

Conditions for applying the diagnosis on a stored fault: the fault is declared present with engine speed above 2000 rpm.

Disconnect the battery and the injection ECU. Check the cleanliness and condition of the ECU connector. Disconnect connector "PPM1" from the Protection and Switching Unit. Check the connector for cleanliness and condition. Using the "Universal breakout box", check continuity of the following link: ECU pin M2, connector B → Protection and Switching Unit connector PPM1 pin 1

Carry out a diagnosis of the Protection and Switching Unit (the Protection and Switching Unit supplies the injection system).

Clean the battery terminals and all connections linked to "+" and "Earth". Check the battery voltage. Check the charging circuit (refer to the corresponding chapter in the Repair Manual).

AFTER REPAIR

Carry out the procedure to confirm the repair:

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF049 PRESENT

REFRIGERANT FLUID SENSOR CIRCUIT 1.DEF: Voltage out of tolerance

INSTRUCTIONS

Nothing to report.

Check the cleanliness and condition of the manifold pressure sensor and its connector.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Connect the "Universal breakout box" in place of the ECU and check insulation and continuity of the following links: ECU pin J2, connector B → Refrigerant fluid sensor ECU pin J3, connector B → Refrigerant fluid sensor ECU pin K2, connector B → Refrigerant fluid sensor (see the connector pin numbers in the corresponding wiring diagram)

If fault DF012 is present or stored, troubleshoot that fault.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Deal with any other faults.

DF059 PRESENT OR STORED

COMBUSTION MISFIRE ON CYLINDER 1 1.DEF: Destructive misfires 2.DEF: Polluting misfires

INSTRUCTIONS

If the following faults are present or stored, deal with them first:

• Ignition: DF072, DF073, DF074 and DF075.
• Fuel supply circuit: DF026, DF027, DF028, DF029 and DF085.
• Flywheel signal: DF005 and DF125.
• Camshaft sensor and phaser: DF080 and DF097.

Check whether other cylinders have a "Misfire" fault before starting the following diagnosis.

Conditions for applying the diagnosis on a stored fault: the fault is declared present under the following conditions:

• No electrical fault present
• Adaptations completed
• Engine warm (minimum 75 °C)
• Run at idle with all consumers switched on for 15 min.

Misfire on cylinder 1 only	The problem is probably due to a component that can only act on this cylinder: check the cylinder 1 injector, check the condition and conformity of the spark plugs, check the cylinder 1 pencil ignition coil. If everything is correct, check the same components on cylinder 4 (to rule out a possible cylinder identification error).
Misfire on cylinders 1 and 4 (see DF062)	The problem is probably due to a component acting on a pair of cylinders: check the ignition coil circuit concerned (apply diagnosis DF072 or DF075), check the condition and conformity of the spark plugs.
Misfire on all four cylinders (see DF060, DF061 and DF062)	The problem is probably caused by a component affecting all cylinders: check the fuel conformity, check the conformity and condition of the spark plugs. (Continued on next page)

AFTER REPAIR

Make sure all faults have been addressed.

Clear the stored faults. Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

• Carry out the catalytic converter diagnosis using the appropriate after-sales service.

If the problem is still present, carry out the following checks: check the crankshaft sensor, check the condition and cleanliness of the flywheel, check the mounting of the crankshaft sensor, check the air gap between sensor and flywheel, check the cylinder compressions, check the complete fuel supply circuit (see the Repair Manual), check the complete ignition system (see the Repair Manual), check the hydraulic tappets if there is camshaft noise (see the Repair Manual).

If the problem is still not resolved, address the other faults, then proceed to the conformity check.

AFTER REPAIR

Make sure all faults have been addressed.

Clear the stored faults. Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

• Carry out the catalytic converter diagnosis using the appropriate after-sales service.

DF060 PRESENT OR STORED

MISFIRE ON CYLINDER 2 1.DEF: Destructive misfires 2.DEF: Polluting misfires

INSTRUCTIONS

If the following faults are present or stored, address them first:

• Ignition: DF072, DF073, DF074 and DF075.
• Fuel supply circuit: DF026, DF027, DF028, DF029 and DF085.
• Flywheel signal: DF005 and DF125.
• Camshaft sensor and phaser: DF080 and DF097.

Check whether other cylinders have a "Misfire" fault before starting the following diagnosis.

Conditions for applying the diagnosis on a stored fault: the fault is declared present under the following conditions:

• No electrical fault present
• Adaptations completed
• Engine warm (minimum 75 °C)
• Run at idle with all consumers switched on for 15 min.

Misfire on cylinder 2 only	The problem is probably due to a component that can only act on this cylinder: check the injector on cylinder 2, check the condition and conformity of the spark plugs, check the ignition coil on cylinder 2. If all is correct, check the same components on cylinder 3 (to allow for a possible cylinder identification error).
Misfire on cylinders 2 and 3 (see DF061)	The problem is probably due to a component acting on a pair of cylinders: check the ignition coil circuit concerned (apply diagnosis DF073 or DF074), check the condition and conformity of the spark plugs.
Misfire on all four cylinders (see DF059, DF061 and DF062)	The problem is probably caused by a component affecting all cylinders: check the fuel conformity, check the conformity and condition of the spark plugs.

AFTER REPAIR

Make sure all faults have been addressed.

Clear the stored faults. Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

• Carry out the catalytic converter diagnosis using the appropriate after-sales service.

If the problem is still present, carry out the following checks: check the crankshaft sensor, check the condition and cleanliness of the flywheel, check the mounting of the crankshaft sensor, check the air gap between crankshaft sensor and flywheel, check the cylinder compressions, check the complete fuel supply circuit (see the Repair Manual), check the complete ignition system (see the Repair Manual), check the hydraulic tappets if there is camshaft noise (see the Repair Manual).

If the problem is still not resolved, address the other faults, then proceed to the conformity check.

AFTER REPAIR

Make sure all faults have been addressed.

Clear the stored faults. Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

• Carry out the catalytic converter diagnosis using the appropriate after-sales service.

DF061 PRESENT OR STORED

MISFIRE ON CYLINDER 3 1.DEF: Destructive misfires 2.DEF: Polluting misfires

INSTRUCTIONS

If the faults are present or stored, address them first:

• Ignition: DF072, DF073, DF074 and DF075.
• Fuel supply circuit: DF026, DF027, DF028, DF029 and DF085.
• Flywheel signal: DF005 and DF125.
• Camshaft sensor and phaser: DF080 and DF097.

Check whether other cylinders have a "Misfire" fault before starting the following diagnosis.

Conditions for applying the diagnosis on a stored fault: the fault is declared present under the following conditions:

• No electrical fault present
• Adaptations completed
• Engine warm (minimum 75 °C)
• Run at idle with all consumers switched on for 15 min.

Misfire on cylinder 3 only	The problem is probably due to a component that can only act on this cylinder: check the injector on cylinder 3, check the condition and conformity of the spark plugs, check the ignition coil on cylinder 3. If all is correct, check the same components on cylinder 2 (to allow for a possible cylinder identification error).
Misfire on cylinders 2 and 3 (see DF060)	The problem is probably due to a component acting on a pair of cylinders: check the ignition coil circuit concerned (apply diagnosis DF073 or DF074), check the condition and conformity of the spark plugs.
Misfire on all four cylinders (see DF059, DF060 and DF062)	The problem is probably caused by a component affecting all cylinders: check the fuel conformity, check the conformity and condition of the spark plugs.

AFTER REPAIR

Make sure all faults have been addressed.

Clear the stored faults. Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

• Carry out the catalytic converter diagnosis using the appropriate after-sales service.

If the problem is still present, carry out the following checks: check the crankshaft sensor, check the condition and cleanliness of the flywheel, check the mounting of the crankshaft sensor, check the air gap between sensor and flywheel, check the cylinder compressions, check the complete fuel supply circuit (see the Repair Manual), check the complete ignition system (see the Repair Manual), check the hydraulic tappets if there is camshaft noise (see the Repair Manual).

If the problem is still not resolved, address the other faults, then proceed to the conformity check.

AFTER REPAIR

Make sure all faults have been addressed.

Clear the stored faults. Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

• Carry out the catalytic converter diagnosis using the appropriate after-sales service

DF062 PRESENT OR STORED

MISFIRE ON CYLINDER 4 1.DEF: Destructive misfires 2.DEF: Polluting misfires

INSTRUCTIONS

If the faults are present or stored, address them first:

• Ignition: DF072, DF073, DF074 and DF075.
• Fuel supply circuit: DF026, DF027, DF028, DF029 and DF085.
• Flywheel signal: DF005 and DF125.
• Camshaft sensor and phaser: DF080 and DF097.

Check whether other cylinders have a "Misfire" fault before starting the following diagnosis.

Conditions for applying the diagnosis on a stored fault: the fault is declared present under the following conditions:

• No electrical fault present
• Adaptations completed
• Engine warm (minimum 75 °C)
• Run at idle with all consumers switched on for 15 min.

Misfire on cylinder 4 only	The problem is probably due to a component that can only act on this cylinder: check the injector on cylinder 4, check the condition and conformity of the spark plugs, check the ignition coil on cylinder 4. If all is correct, check the same components on cylinder 1 (to allow for a possible cylinder identification error).
Misfire on cylinders 1 and 4 (see DF059)	The problem is probably due to a component acting on a pair of cylinders: check the ignition coil circuit concerned (apply diagnosis DF072 or DF075), check the condition and conformity of the spark plugs.
Misfire on all four cylinders (see DF059, DF060 and DF061)	The problem is probably caused by a component affecting all cylinders: check the fuel conformity, check the conformity and condition of the spark plugs.

AFTER REPAIR

Make sure all faults have been addressed.

Clear the stored faults. Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

• Carry out the catalytic converter diagnosis using the appropriate after-sales service.

If the problem is still present, carry out the following checks: check the crankshaft sensor, check the condition and cleanliness of the flywheel, check the mounting of the crankshaft sensor, check the air gap between sensor and flywheel, check the cylinder compressions, check the complete fuel supply circuit (see the Repair Manual), check the complete ignition system (see the Repair Manual), check the hydraulic tappets if there is camshaft noise (see the Repair Manual).

If the problem is still not resolved, address the other faults, then proceed to the conformity check.

AFTER REPAIR

Make sure all faults have been addressed.

Clear the stored faults. Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

• Carry out the catalytic converter diagnosis using the appropriate after-sales service.

DF065 PRESENT OR STORED

MISFIRE 1.DEF: Destructive misfires 2.DEF: Polluting misfires

INSTRUCTIONS

If the following faults are present or stored, deal with them first:

• Ignition: DF072, DF073, DF074 and DF075.
• Fuel supply circuit: DF026, DF027, DF028, DF029 and DF085.
• Flywheel signal: DF005 and DF125.
• Camshaft sensor and phaser: DF080 and DF097.
• Cylinder misfires: DF059, DF060, DF061 and DF062.

Conditions for applying the diagnosis on a stored fault: The fault is declared present under the following conditions:

• No electrical fault present
• Adaptations completed
• Engine warm (minimum 75 °C)
• Run at idle with all consumers switched on for 15 min.

Check the injectors. Check the condition and conformity of the spark plugs. Check the ignition coils. Check the fuel conformity.

If the problem is still present, carry out the following checks: check the crankshaft sensor, check the condition and cleanliness of the flywheel, check the mounting of the crankshaft sensor, check the air gap between sensor and flywheel, check the cylinder compressions, check the complete fuel supply circuit (see the Repair Manual), check the complete ignition system (see the Repair Manual), check the hydraulic tappets if there is camshaft noise (see the Repair Manual).

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Make sure all faults have been addressed.

Do not clear the adaptations.

To check that the system has been correctly repaired:

• No electrical fault must be present.
• Adaptations must have been carried out.
• Engine must be warm (minimum 75 °C).
• Run at idle with all consumers switched on for 15 minutes.

If the fault returns, continue the diagnosis.

DF072 PRESENT OR STORED

IGNITION COIL CIRCUIT CYLINDER 1 CO.0: Open circuit or short to ground CC.1: Short to +12 V

INSTRUCTIONS

If faults DF046, DF084 or DF085 are present or stored, address them first.

If the "Ignition coil circuit cylinder 4" fault is also present or stored, address it first.

Conditions for applying the diagnosis on a stored fault: The fault is declared present following starter operation for 10 seconds, or a 10-second engine-running delay.

Disconnect the connector of the ignition coil on cylinder 1. Check the cleanliness and condition of the ignition coil and its connector.

Check the primary and secondary resistance of the ignition coil on cylinder 1 (see the values in the "Help" chapter). If the values are not within specification, replace the ignition coil.

Disconnect the battery and the injection ECU. Check the connector for cleanliness and condition. Connect the "universal breakout box" in place of the ECU and check the insulation and continuity of the following link: ECU pin M4, connector C → Coil 1 Coil 4 → Coil 1 (See the connector pin number in the relevant wiring diagram.)

If the problem persists, replace the faulty ignition coil.

If the problem persists, deal with the other faults, then carry out the conformity check.

AFTER REPAIR

Run the "Diagnostic application condition on stored fault":

• If the fault is present, continue troubleshooting the fault.
• If the fault is stored, disregard it.

Deal with any other faults.

Clear the stored faults.

DF073 PRESENT OR STORED

IGNITION COIL CIRCUIT CYLINDER 2 CO.0: Open circuit or short to ground CC.1: Short to +12 V

INSTRUCTIONS

If faults DF046, DF084 or