What does code P236F mean?

Q: What does code P236F mean?

Cylinder 12 Combustion Performance. P236F indicates that the engine control module (ECM) has detected a combustion performance problem specifically on cylinder 12, typically by monitoring crankshaft speed fluctuations or ionization current. The ECM sets this code when cylinder 12's contribution to engine power falls outside the expected range, which usually points to a misfire or a mechanical fault on that cylinder.

DTC codes / P23xx · Ignition system and misfire / P236F

P236FCylinder 12 Combustion Performance

P236F indicates that the engine control module (ECM) has detected a combustion performance problem specifically on cylinder 12, typically by monitoring crankshaft speed fluctuations or ionization current. The ECM sets this code when cylinder 12's contribution to engine power falls outside the expected range, which usually points to a misfire or a mechanical fault on that cylinder.

SystemPowertrain

Code typeGeneric (all makes)

SeverityHigh

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.