Powertrain
generic / SAE
P03E4
Cylinder 8 Combustion Performance
The closed-loop combustion controller reports that combustion performance on cylinder 8 is below the calibrated quality metric. Computed from the cylinder pressure trace — IMEP (indicated mean effective pressure), CA50 (50% mass burnt angle) or peak pressure deviates from the model.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / E4
Possible causes
- Injector flow rate drift high
- Gateway module routing CAN messages incorrectly low
- CAN terminating resistor (120 Ω) drifted out of spec low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 200–2500 €
- Estimated time: 1–6 h
- Component: cylinder pressure sensor
- Component: fuel injector
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012