P021E — Cylinder 11 Injection Timing Fault

What P021E means

The engine control module compares the actual start of fuel injection in cylinder 11 with the calculated target and flags an out-of-range deviation. This code is mainly seen on large multi-cylinder direct-injection diesels. Injection timing depends on a healthy injector, its wiring, rail fuel pressure and signals from the crankshaft and camshaft position sensors.

Symptoms

• Check Engine light on
• Rough idle
• Loss of power or hesitation
• Increased fuel consumption
• Diesel fuel smell
• Misfire or engine vibration

Possible causes

1. Faulty cylinder 11 fuel injector (electrical or mechanical)
2. Damaged wiring or poor connector contact in the injector circuit
3. Incorrect mechanical timing between crankshaft and camshaft
4. Faulty crankshaft or camshaft position sensor
5. High-pressure fuel system fault
6. Low fuel supply or rail pressure
7. Air leak affecting the mixture

How to diagnose

1. Scan all codes and freeze-frame data, noting any other injector or sensor codes
2. Review cylinder balance and fuel correction values for cylinder 11 against the others
3. Inspect the cylinder 11 injector harness and connector for chafing, oil and corroded pins
4. Test injector circuit resistance and check for shorts to ground or power
5. Scope the crankshaft and camshaft sensor signals
6. Measure fuel pressure in the rail and on the low-pressure supply side
7. Verify timing marks and cam/crank correlation, and check the drive condition
8. Inspect intake and fuel lines for air leaks or seepage

Common fixes

• Replace or repair the cylinder 11 injector and perform any required coding or adaptation
• Repair damaged wiring and connectors
• Correct the mechanical engine timing
• Replace a faulty crankshaft or camshaft position sensor
• Repair the high-pressure or low-pressure fuel system fault

Questions and answers

What does P021E mean?

It means the engine computer found the fuel injection timing for cylinder 11 to be off from its target. Common culprits are the injector, its wiring, the shaft position sensors or engine timing.

Can I drive with code P021E?

Only a short distance to a shop. If the engine shakes badly, smokes or loses a lot of power, stop driving to avoid engine damage.

How do I diagnose P021E?

Start by inspecting the cylinder 11 injector wiring and checking cylinder balance. Then test fuel pressure, the crank and cam sensors, and the timing alignment.

This is general information about the code. The meaning can differ between makes and models: a scan tool and the repair manual for your car will show the exact cause.