What does code P03FA mean?

Q: What does code P03FA mean?

Ignition K Control Signal Circuit/Open. P03FA indicates that the powertrain control module (PCM) has detected an open circuit or loss of continuity on the ignition coil control signal circuit for the ignition coil designated as 'K'. The PCM commands each coil to fire by grounding or pulsing a control wire, and when the voltage on that circuit does not behave as expected during a self-test, the PCM stores this code and may disable the affected cylinder's ignition coil.

DTC codes / P03xx · Ignition system and misfire / P03FA

P03FAIgnition K Control Signal Circuit/Open

P03FA indicates that the powertrain control module (PCM) has detected an open circuit or loss of continuity on the ignition coil control signal circuit for the ignition coil designated as 'K'. The PCM commands each coil to fire by grounding or pulsing a control wire, and when the voltage on that circuit does not behave as expected during a self-test, the PCM stores this code and may disable the affected cylinder's ignition coil.

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.