Powertrain
generic / SAE
P234E
Cylinder 9 Pressure Too High
Cylinder 9 measured peak combustion pressure is above the calibrated maximum — typically pre-ignition, knock, over-fuelling, or runaway combustion.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 4E
Possible causes
- Injector overdelivery on cylinder 9 high
- Pre-ignition or knock medium
Inspection / repair
- Difficulty: hard
- DIY: shop recommended
- Estimated cost: 400–3500 €
- Estimated time: 2–10 h
- Component: cylinder 9 combustion
- Component: fuel injector cyl 9
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012