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
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References
sae:J2012