Faulty or sticking cylinder 10 fuel injector, or a fault in its internal timing response; Wiring or connector fault on the cylinder 10 injector circuit (high resistance, chafing, corrosion or loose pin); Fuel pressure or fuel quality problem causing injection to start earlier than commanded; Crankshaft or camshaft position sensor signal fault or timing correlation error affecting injection timing control; Mechanical timing fault such as a stretched or jumped timing chain or belt; Outdated or faulty engine control unit calibration, or an internal control unit fault.

P01DE

Cylinder 10 Injection Timing Performance - Over Advanced.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
1: AreaFuel and air metering
DE: FaultThe specific fault in that area

What it means

P01DE is a generic powertrain code meaning the engine control unit has detected that fuel injection timing on cylinder 10 is over-advanced, so injection is starting earlier than the commanded value. It is set when the measured or inferred injection timing for that cylinder differs from the target by more than the allowed limit. It only applies to engines with at least ten cylinders, and how the timing is monitored depends on the engine.

Symptoms

Engine warning light on
Rough running or misfire, especially at idle
Diesel knock or harsh combustion noise from one cylinder
Reduced power or the engine entering limp mode
Increased smoke, fuel smell or poorer fuel economy
Hard starting or uneven idle

Possible causes

Faulty or sticking cylinder 10 fuel injector, or a fault in its internal timing responselikely
Wiring or connector fault on the cylinder 10 injector circuit (high resistance, chafing, corrosion or loose pin)likely
Fuel pressure or fuel quality problem causing injection to start earlier than commandedpossible
Crankshaft or camshaft position sensor signal fault or timing correlation error affecting injection timing controlpossible
Mechanical timing fault such as a stretched or jumped timing chain or beltrare
Outdated or faulty engine control unit calibration, or an internal control unit faultrare

How to diagnose

Read all stored and pending codes and the freeze frame data, noting engine speed, load, temperature and fuel pressure when the fault set
Check for related codes such as other cylinder timing, injector circuit, fuel pressure or crank/cam correlation faults, and diagnose those first
Inspect the cylinder 10 injector wiring and connector for damage, corrosion, oil contamination and poor pin tension
Check the fuel for contamination and review fuel pressure readings against specification at idle and under load
Review live data for injector correction values or balance rates and compare cylinder 10 with the other cylinders
Check crankshaft and camshaft sensor signals and their waveforms, and confirm the mechanical timing is correct
Swap the injector with another cylinder if the design permits and see whether the fault follows it
Check whether a calibration update is listed for this engine and vehicle

How to fix

Repair or replace damaged wiring or connectors on the cylinder 10 injector circuit
Replace the cylinder 10 injector and complete any required coding or adaptation procedure for the engine
Correct fuel supply faults, drain contaminated fuel and replace filters as needed
Replace faulty crankshaft or camshaft position sensors, or repair their wiring
Correct the mechanical timing fault if the chain, belt or tensioner is worn or has slipped
Update the control unit calibration only where an outdated or faulty one is a confirmed cause

Can I keep driving?

Medium severity

Short, gentle driving to a workshop is usually acceptable, but avoid heavy loads and high revs. If there is a heavy knock, a strong fuel smell, smoke or a flashing warning light, stop driving, as over-advanced injection can damage the engine.

Guide written by AI from the code's definition. Confirm with a diagnosis before replacing parts.