P0351: Ignition Coil A Primary/Secondary Circuit Malfunction
Severity: high
What it means: There's a problem in the primary or secondary circuit of ignition coil A.
Safe to drive? Drive only to a shop. The matching cylinder will likely misfire, and that can damage the catalytic converter.
Common symptoms
- Misfire or rough running
- Check-engine light (may flash)
- Loss of power
Likely causes, ranked
- Failed ignition coil$218DIY
CarMD 2024 national average about $218
- Wiring or connector faultDIY
- Worn spark plug overloading the coil$400DIY
CarMD 2024 national average about $400
What it means: There's a problem in the primary or secondary circuit of ignition coil A.
Severity: High. Safe to drive? Drive only to a shop. The matching cylinder will likely misfire, and that can damage the catalytic converter.
DIY or shop?
Coil swaps are a common DIY job.
Before you replace parts
- Read all stored codes and freeze-frame data. Fix misfire, fuel or sensor codes before chasing emissions codes.
- Check the simple things first: connectors, vacuum hoses, fluid levels and the gas cap.
- Clear the code only after a repair, then confirm it stays off after a few drives.
- Check your VIN for recalls and service bulletins.
Safety / mechanic note
Verify with a mechanic. This code can involve stalling, engine damage or loss of power. If the check-engine light is flashing, or the car stalls or runs badly, stop driving and have it inspected.