What does code P2331 mean?

Q: What does code P2331 mean?

Ignition Coil 'K' Primary Control Circuit High. P2331 means the engine computer (PCM) commanded the ignition coil for cylinder 'K' to fire, but the primary control circuit stayed at a high voltage instead of being pulled low as expected. The PCM detects this by monitoring the coil driver circuit and flags the code when the voltage remains above its threshold for a set period.

DTC codes / P23xx · Ignition system and misfire / P2331

P2331Ignition Coil 'K' Primary Control Circuit High

P2331 means the engine computer (PCM) commanded the ignition coil for cylinder 'K' to fire, but the primary control circuit stayed at a high voltage instead of being pulled low as expected. The PCM detects this by monitoring the coil driver circuit and flags the code when the voltage remains above its threshold for a set period.

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.