P0350Ignition Coil Primary/Secondary Circuit/Open
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- How the car detects it
- P0350 is the general ignition coil circuit code without assignment to a coil: the engine module detects a fault in the primary or secondary circuit of a coil but does not report which one. This typically concerns older systems with a shared output stage or ignition module, or a shared feedback line for all coils. The monitoring works as for P0351 ff – primary-current feedback for each ignition command, or the voltage at the driver. GM and Ford report coil faults individually (P0351 ff, P2300 ff) and do not use P0350; the description follows CARB's output monitoring requirement, which allows one collective code.
- What you may notice
- Check engine light on
- Misfire, rough running
- Starting problems or stalling if a shared output stage fails
- Likely causes
- LikelyIgnition coil, coil pack or ignition module faulty
- PossibleShared supply (fuse, relay, ignition feed) or ground open
- PossibleHarness, connector or feedback line to the coils faulty
- RareIgnition lead or plug connector damaged (secondary side)
- RareEngine module or driver
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €400
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.