P0359
Ignition Coil I Primary Control Circuit/Open
Ignition coil
Generic OBD-II
High
What it means
P0359 means the ECM has detected an open or fault in the primary control circuit of ignition coil "I" (the ninth coil). That coil isn't firing its cylinder properly, so the engine misfires, runs rough, and loses power. It's a single-coil circuit fault — the engine still runs, but the affected cylinder is dead or weak.
High
Can I keep driving? Driveable but rough — the affected cylinder misfires with this coil circuit open, and sustained misfiring can damage the catalytic converter, so repair it soon.
Common symptoms
What you'll notice
- Check-engine light on (may flash during an active misfire)
- Misfire on the affected cylinder
- Rough idle and vibration
- Reduced power and hesitation
Common causes
Most likely first
- Faulty ignition coil (coil I / coil 9)Likely
- Open or shorted primary-control wiring to that coilCommon
- Poor connector contact or corrosionCommon
- Faulty coil driver in the ECMLess often
How to diagnose & fix
Work through it in order
- Read freeze-frame data and confirm the misfiring cylinder.
- Inspect the coil connector and control wire for opens or damage.
- Swap the suspect coil with a known-good one and see if the fault follows.
- Replace the coil if it's at fault.
- If wiring and coil are good, check the ECM coil driver. Clear and re-test.
FAQ
Quick answers
Is it safe to drive with P0359?+
Briefly, but a persistent misfire overheats and can ruin the catalytic converter — don't drive on it long.
Can I just clear P0359?+
It returns within a few drive cycles until the coil or its wiring is fixed.
Related codes
Often seen with P0359
Read & clear P0359 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.
✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX