What does code P2318 mean?

Q: What does code P2318 mean?

Ignition Coil 'G' Primary Control Circuit Low. P2318 means the powertrain control module (PCM) has detected a low-voltage condition on the primary control circuit for ignition coil 'G'. The PCM commands the coil to fire by grounding the primary circuit, and it monitors the voltage on that circuit to verify the command is being carried out; a low reading indicates the circuit is shorted to ground or the coil's internal switching component has failed.

DTC codes / P23xx · Ignition system and misfire / P2318

P2318Ignition Coil 'G' Primary Control Circuit Low

P2318 means the powertrain control module (PCM) has detected a low-voltage condition on the primary control circuit for ignition coil 'G'. The PCM commands the coil to fire by grounding the primary circuit, and it monitors the voltage on that circuit to verify the command is being carried out; a low reading indicates the circuit is shorted to ground or the coil's internal switching component has failed.

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.