P0350 Code: Ignition Coil Primary/Secondary Circuit Malfunction
🟠 Moderate severity · drivable
Drivable, but the engine will misfire. Stop and get a tow if the check engine light is flashing.
What P0350 means
The engine computer found an electrical problem in an ignition coil circuit, either the low-voltage primary side or the high-voltage secondary side. This is a general coil code — codes like P0351 through P0362 point to a specific coil, while P0350 means the computer can't tell which one is bad.
Symptoms
- Check engine light on (may flash)
- Rough idle or misfire
- Loss of power
- Poor fuel economy
Common causes
- most common: Faulty ignition coil
- common: Damaged wiring or loose connector at a coil
- less common: Failed ignition driver in the engine computer
- less common: Worn spark plugs stressing the coil
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Inspect the coil wiring and connectors | Yes | $0–10 |
| Replace the faulty ignition coil | Yes | $50–200 |
| Have a shop test each coil circuit with a scan tool | Mechanic | $80–150 |
Frequently asked questions
Can I drive with a P0350 code?
Yes if the light is steady, but the engine will misfire. Stop and get a tow if the light is flashing.
What is the most common cause of P0350?
A faulty ignition coil. Codes P0351 and up show which coil is bad.
How much does it cost to fix a P0350?
Typically $50–$200 for a new ignition coil.
Related codes
P0351
P0351 Code: Ignition Coil A Primary/Secondary Circuit Malfunction (Cylinder 1)
P0352P0352 Code: Ignition Coil B Primary/Secondary Circuit Malfunction (Cylinder 2)
P0300P0300 Code: Random/Multiple Cylinder Misfire Detected
Updated 2026-08. This page is informational and not a substitute for professional diagnosis.