What does code P03FE mean?

Q: What does code P03FE mean?

Ignition L Control Signal Circuit Low. P03FE indicates that the powertrain control module has detected an abnormally low voltage on the ignition control signal circuit for the engine's number one ignition coil or cylinder. The computer expects to see a pulsed signal that switches between high and low voltage as it commands the coil to fire, and a signal that stays low for too long tells the module that the circuit is shorted to ground or that the coil driver has failed.

DTC codes / P03xx · Ignition system and misfire / P03FE

P03FEIgnition L Control Signal Circuit Low

P03FE indicates that the powertrain control module has detected an abnormally low voltage on the ignition control signal circuit for the engine's number one ignition coil or cylinder. The computer expects to see a pulsed signal that switches between high and low voltage as it commands the coil to fire, and a signal that stays low for too long tells the module that the circuit is shorted to ground or that the coil driver 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.