What does code P0311 mean?

Q: What does code P0311 mean?

Cylinder 11 Misfire Detected. P0311 is a generic OBD-II code indicating that the engine control module has detected a misfire on cylinder 11, which is typically found on high-cylinder-count engines such as V12 or W12 configurations. The computer monitors crankshaft speed fluctuations and identifies that cylinder 11 is not contributing power consistently, often by comparing acceleration pulses from each firing event.

DTC codes / P03xx · Ignition system and misfire / P0311

P0311Cylinder 11 Misfire Detected

P0311 is a generic OBD-II code indicating that the engine control module has detected a misfire on cylinder 11, which is typically found on high-cylinder-count engines such as V12 or W12 configurations. The computer monitors crankshaft speed fluctuations and identifies that cylinder 11 is not contributing power consistently, often by comparing acceleration pulses from each firing event.

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.