What does code P2344 mean?

Q: What does code P2344 mean?

Cylinder #9 Above Knock Threshold. P2344 is a manufacturer-specific powertrain code that indicates the engine control module (ECM) has detected abnormal knock activity specifically on cylinder number 9, exceeding the calibrated knock threshold. The ECM monitors the knock sensor signal and correlates it to individual cylinder firing events, and when cylinder 9 consistently produces knock intensity above the acceptable limit, it stores this code and may retard ignition timing to protect the engine.

DTC codes / P23xx · Ignition system and misfire / P2344

P2344Cylinder #9 Above Knock Threshold

P2344 is a manufacturer-specific powertrain code that indicates the engine control module (ECM) has detected abnormal knock activity specifically on cylinder number 9, exceeding the calibrated knock threshold. The ECM monitors the knock sensor signal and correlates it to individual cylinder firing events, and when cylinder 9 consistently produces knock intensity above the acceptable limit, it stores this code and may retard ignition timing to protect the engine.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

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.