P01E0

What it means

P01E0 is a generic powertrain code meaning the engine control unit has judged the injection timing for cylinder 11 to be over-advanced, so fuel is being delivered earlier than commanded or earlier than the engine's operating conditions allow. The ECU compares the commanded start of injection with the actual timing, which it infers from injector feedback, crank and cam position signals or other sensors. The code is only relevant to engines with at least 11 cylinders, and the exact monitoring method varies by manufacturer and engine.

Symptoms

• Engine management warning light on
• Rough running or misfire, mainly on one cylinder
• Harsh diesel knock or pinking under load
• Reduced power or the engine entering a limp mode
• Increased exhaust smoke or a strong fuel smell
• Hard starting or uneven idle

Possible causes

• Faulty or drifting fuel injector on cylinder 11, such as a sticking or slow-responding injectorlikely
• Wiring or connector fault in the cylinder 11 injector circuit, such as chafing, corrosion or a high-resistance jointlikely
• Crankshaft or camshaft position sensor signal fault, or a damaged reluctor or trigger wheel, giving incorrect timing referencepossible
• Incorrect fuel pressure, from a failing pump, regulator or pressure control fault, that affects injection timingpossible
• Mechanical timing fault, such as a stretched or slipped timing chain or belt, or incorrect valve timingpossible
• Outdated or faulty ECU software or calibrationrare
• Internal ECU driver fault for the cylinder 11 injectorrare

How to diagnose

1. Read all stored and pending codes and the freeze frame data, noting engine load, speed, temperature and fuel pressure when the fault set.
2. Check for other related codes, such as other cylinder timing, misfire, rail pressure or crank and cam correlation codes, and diagnose those first if present.
3. Inspect the cylinder 11 injector wiring and connector for damage, corrosion, oil contamination or poor pin tension.
4. Check live data for injector corrections or balance rates for cylinder 11 compared with the other cylinders.
5. Check the crankshaft and camshaft sensor signals and their correlation, and inspect the sensors, wiring and trigger wheels.
6. Measure actual fuel pressure against the specification and check the fuel supply for faults or contamination, following the procedure for the specific engine.
7. Test the cylinder 11 injector electrically and, if needed, perform a hydraulic or leak-off test as specified for that engine.
8. Check the valve timing against the manufacturer's data, and check whether a software update applies to that engine.

How to fix

• Repair or replace damaged wiring or connectors in the cylinder 11 injector circuit.
• Replace the faulty cylinder 11 injector and carry out any coding or adaptation the manufacturer requires.
• Replace a faulty crankshaft or camshaft sensor, or repair a damaged trigger wheel.
• Correct the fuel pressure fault by repairing or replacing the faulty pump, regulator or pressure control component, or by replacing contaminated fuel.
• Correct the mechanical timing fault, replacing worn timing components and setting the timing to specification.
• Apply an updated ECU calibration only if the manufacturer lists it as a fix for this fault.

Can I keep driving?

Nearby codes

• P01DFGenericCylinder 11 Injection Timing Performance - Over Retarded
• P01E1GenericCylinder 12 Injection Timing Performance - Over Retarded