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DTC codes / P23xx · Ignition system and misfire / P235B

P235BCylinder 10 Combustion Performance

P235B indicates that the powertrain control module (PCM) has detected a combustion performance problem specifically on cylinder 10, typically by monitoring crankshaft speed fluctuations and comparing them to expected values. The code means cylinder 10 is not contributing its fair share of power, which can be caused by ignition, fuel, compression, or mechanical faults.

SystemPowertrain
Code typeGeneric (all makes)
SeverityMedium
Fix difficultyProfessional
AreaIgnition system and misfire

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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