What does code P1357 mean?

Q: What does code P1357 mean?

IC Output High Pulse Detected When Grounded Cyl 7. P1357 on a GM vehicle means the ignition control (IC) circuit for cylinder 7 is commanding a high output pulse while the circuit is grounded, indicating a short to ground or a failed ignition control module driver. The engine control module (ECM) monitors the IC circuit and sets this code when the expected voltage state does not match the commanded state during the cylinder 7 firing event.

DTC codes / GM codes / P1357

P1357 · GMIC Output High Pulse Detected When Grounded Cyl 7

P1357 on a GM vehicle means the ignition control (IC) circuit for cylinder 7 is commanding a high output pulse while the circuit is grounded, indicating a short to ground or a failed ignition control module driver. The engine control module (ECM) monitors the IC circuit and sets this code when the expected voltage state does not match the commanded state during the cylinder 7 firing event.

SystemPowertrain

Code typeGM specific

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for GM vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.