Powertrain
generic / SAE
P2351
Cylinder 9 Combustion Performance
The closed-loop combustion controller reports that combustion performance on cylinder 9 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
GroupP2
Range / number3 / 51
Possible causes
- Mean effective pressure outside model high
- Injector flow has drifted medium
- Gateway module routing CAN messages incorrectly low
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–2500 €
- Estimated time: 1.5–6 h
- Component: cylinder 9 combustion
- Component: cylinder pressure sensor 9
- Component: fuel injector cyl 9
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012