What does code P236B mean?

Q: What does code P236B mean?

Cylinder 12 Pressure Too Low. P236B indicates that the engine control module has detected a cylinder 12 pressure reading that is below the expected threshold during the combustion cycle, based on inputs from the cylinder pressure sensor. This code is typically found on engines with individual cylinder pressure monitoring, often diesel or high-performance applications, and points to a mechanical or sensor-related issue specific to cylinder 12.

DTC codes / P23xx · Ignition system and misfire / P236B

P236BCylinder 12 Pressure Too Low

P236B indicates that the engine control module has detected a cylinder 12 pressure reading that is below the expected threshold during the combustion cycle, based on inputs from the cylinder pressure sensor. This code is typically found on engines with individual cylinder pressure monitoring, often diesel or high-performance applications, and points to a mechanical or sensor-related issue specific to cylinder 12.

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.