Cylinder 10 injector leaking, sticking open or delivering too much fuel; Injector wiring or connector fault (high resistance, corrosion, poor pin tension) affecting cylinder 10; Fuel pressure too high or a fault in the fuel pressure regulation on the affected side; Mechanical issue in cylinder 10 such as low compression or an air leak that upsets the fuel/air balance and learning; Injector correction data not correctly set after an injector replacement, where the engine requires it; Fault within the engine control unit's injector driver; Outdated or faulty ECU calibration, where the manufacturer has a known issue.

P02DE

Cylinder 10 Fuel Injector A Offset Learning At Min Limit.

Generic
Powertrain
Generic code
Medium severity

How this code is built

P: SystemPowertrain
0: Defined bySAE, the same on every car
2: AreaFuel and air metering (injector circuit)
DE: FaultThe specific fault in that area

What it means

P02DE means the engine control unit has learned a fuel offset correction for the cylinder 10 injector (bank/circuit A) and that correction has reached its minimum limit. The ECU trims each injector's delivery to match its measured behaviour, and in this case it has run out of room to reduce fuel for that cylinder. This points to cylinder 10 receiving more fuel than commanded, or a fault the learning cannot compensate for. Only engines with at least ten cylinders use this code, and how the offset is learned varies by engine.

Symptoms

Engine management light on
Rough idle or uneven running, especially when warm
Misfire or hesitation under load
Black smoke or a strong fuel smell from the exhaust
Higher than normal fuel consumption
Other injector offset or misfire codes stored alongside

Possible causes

Cylinder 10 injector leaking, sticking open or delivering too much fuellikely
Injector wiring or connector fault (high resistance, corrosion, poor pin tension) affecting cylinder 10possible
Fuel pressure too high or a fault in the fuel pressure regulation on the affected sidepossible
Mechanical issue in cylinder 10 such as low compression or an air leak that upsets the fuel/air balance and learningpossible
Injector correction data not correctly set after an injector replacement, where the engine requires itpossible
Fault within the engine control unit's injector driverrare
Outdated or faulty ECU calibration, where the manufacturer has a known issuerare

How to diagnose

Read all stored codes and freeze frame data, and note any misfire, fuel trim or other injector codes
Check for related technical bulletins or known issues for the specific model and engine
Inspect the cylinder 10 injector connector and wiring for damage, corrosion, fluid ingress and poor pin fit
Check live data for cylinder 10 injector correction values and compare with the other cylinders
Check fuel trims and fuel rail pressure against specification at idle and under load
Look for fuel smell, wet injector seals or fuel dilution of the engine oil, which suggests a leaking injector
Test the injector electrically (resistance and driver signal) following the manufacturer's procedure
Carry out a compression or leak-down test on cylinder 10 if the injector and fuel supply check out

How to fix

Replace the cylinder 10 injector if it is leaking or delivering excess fuel, and code or adapt it as the engine requires
Repair or replace damaged injector wiring or connectors
Correct the fuel pressure fault found in the regulation or supply system
Repair the mechanical or air leak fault affecting cylinder 10
Reset the learned values and run the adaptation procedure after repair, then confirm the code does not return
Update the ECU calibration only if a known fault with the existing software is confirmed for the vehicle

Can I keep driving?

Medium severity

The car can usually be driven carefully for a short time, but have it checked soon. Excess fuel in a cylinder can wash oil from the bore, dilute the engine oil and overload the catalytic converter, so avoid hard driving and stop if it runs badly or misfires.

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