Rail pressure sensor

K9K

The pressure sensor (1) cannot be removed from the spherical injection rail.

If the pressure sensor fails, the "pressure sensor - rail and high-pressure pipes" assembly must be replaced (Diesel Injection chapter, Injection Rail, page 13B-75).

B84 or C84, and F9Q

Before any work on the injection system, use the diagnostic tool to check:

• that the injection rail is no longer under pressure,
• that the fuel temperature is not too high.

• Always observe the safety and cleanliness instructions given in this document during every operation.
• Never loosen a high-pressure pipe connection while the engine is running.

• Use the special plug kit for the high-pressure injection circuit.
• Always replace any high-pressure pipe and high-pressure pipe clips that have been removed.

REMOVAL

• Disconnect:

• the battery,
• the pressure sensor.

• Unscrew the pressure sensor.

INSTALLATION

• Replace the gasket.
• Screw in the sensor.
• Tighten the pressure sensor to torque (3.5 daN.m +/- 0.5).
• Connect the connector.

Connect the battery; carry out the necessary re-learns (see Electrical Equipment chapter).

Check for diesel leaks:

• run the engine at idle until the radiator fan starts,
• rev the engine several times with no load,
• carry out a road test,
• switch off the ignition,
• check that no diesel is leaking.