What does code P1358 mean?

Q: What does code P1358 mean?

IC Output High Pulse Detected When Grounded Cyl 8. P1358 on GM vehicles means the ignition control module (ICM) has detected an unexpected high-voltage pulse on the cylinder 8 ignition control circuit while that circuit is supposed to be grounded. The computer commanded the coil for cylinder 8 to fire but saw voltage where it expected a ground, indicating a fault in the ignition coil, wiring, or ICM itself.

DTC codes / GM codes / P1358

P1358 · GMIC Output High Pulse Detected When Grounded Cyl 8

P1358 on GM vehicles means the ignition control module (ICM) has detected an unexpected high-voltage pulse on the cylinder 8 ignition control circuit while that circuit is supposed to be grounded. The computer commanded the coil for cylinder 8 to fire but saw voltage where it expected a ground, indicating a fault in the ignition coil, wiring, or ICM itself.

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.