What does code P0358 mean?

Q: What does code P0358 mean?

Ignition Coil 'H' Primary/Secondary Circuit. P0358 is a generic powertrain code that the engine computer sets when it detects an abnormal electrical condition in the primary or secondary circuit of ignition coil 'H', which is the eighth coil in the manufacturer's firing order or cylinder labeling. The computer monitors coil dwell and current ramping on the primary side and can infer secondary circuit integrity from the primary feedback, so it flags this code when the expected voltage or current signature falls outside the calibrated window.

DTC codes / P03xx · Ignition system and misfire / P0358

P0358Ignition Coil 'H' Primary/Secondary Circuit

P0358 is a generic powertrain code that the engine computer sets when it detects an abnormal electrical condition in the primary or secondary circuit of ignition coil 'H', which is the eighth coil in the manufacturer's firing order or cylinder labeling. The computer monitors coil dwell and current ramping on the primary side and can infer secondary circuit integrity from the primary feedback, so it flags this code when the expected voltage or current signature falls outside the calibrated window.

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.