What does code P2343 mean?

Q: What does code P2343 mean?

Cylinder #8 Above Knock Threshold. This code means the engine computer detected abnormal vibration or noise from cylinder number eight that exceeds the threshold for acceptable combustion knock. The knock sensor signal for that cylinder is stronger than expected, so the computer flags a fault because the cylinder is not burning fuel smoothly or something is mechanically noisy.

DTC codes / P23xx · Ignition system and misfire / P2343

P2343Cylinder #8 Above Knock Threshold

This code means the engine computer detected abnormal vibration or noise from cylinder number eight that exceeds the threshold for acceptable combustion knock. The knock sensor signal for that cylinder is stronger than expected, so the computer flags a fault because the cylinder is not burning fuel smoothly or something is mechanically noisy.

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.