P020E

What it means

P020E is the generic SAE J2012 code for a fault with cylinder 5 injection timing. The engine control unit has seen the injection event for that cylinder start earlier or later than commanded, or outside the allowed range. How it measures this depends on the engine, for example by injector feedback, needle lift or crank and cam correlation, so the exact trigger varies by model.

Symptoms

• Engine management light on
• Rough running or misfire, especially at idle or under light load
• Noticeable diesel knock or harsh combustion on one cylinder
• Hard starting or extended cranking
• Loss of power or the engine running in a reduced-power mode
• Increased smoke or higher fuel consumption

Possible causes

• Faulty or worn cylinder 5 injector, or one that is sticking or responding slowlylikely
• Wiring or connector fault in the cylinder 5 injector circuit, such as high resistance, corrosion or chafinglikely
• Low or unstable fuel pressure from a weak supply, blocked filter or a failing high-pressure pump or regulatorpossible
• Crankshaft or camshaft position sensor signal problem upsetting timing referencepossible
• Mechanical timing fault, such as a jumped or incorrectly set timing belt or chain, or a worn injection pump drivepossible
• Engine control unit fault or outdated calibration (only where the manufacturer has identified one)rare

How to diagnose

1. Read all stored and pending codes and the freeze frame data, noting engine speed, load, temperature and fuel pressure when the fault set.
2. Look for other related codes such as injector circuit, rail pressure, crank or cam correlation, or misfire codes, and deal with those first.
3. Inspect the cylinder 5 injector wiring and connectors for damage, corrosion, oil ingress and poor pin tension.
4. Check fuel quality, fuel filter condition and low-pressure supply, following the manufacturer's procedure for your engine.
5. Compare live data for fuel pressure actual against requested, and any per-cylinder correction or balance values, looking for cylinder 5 outliers.
6. Check crank and cam sensor signals and wiring, and confirm the mechanical timing marks or correlation values are correct.
7. Test the cylinder 5 injector electrically and by its leak-off or return flow, using the procedure specified for the engine.
8. Check the manufacturer's service information for software updates or known issues relating to this code on your model.

How to fix

• Repair any damaged wiring or connectors in the cylinder 5 injector circuit.
• Replace the cylinder 5 injector if it fails electrical or flow testing, and code or adapt it as the manufacturer requires.
• Replace the fuel filter and correct any low-pressure fuel supply faults, then repair any high-pressure pump or regulator fault found.
• Replace a faulty crank or cam position sensor, or fix its wiring.
• Correct the mechanical timing and replace worn drive components if timing is out.
• Apply a manufacturer calibration update only if one is documented for this fault.

Can I keep driving?

Nearby codes

• P020DGenericCylinder 4 Injection Timing
• P020FGenericCylinder 6 Injection Timing