P0351 Code: Ignition Coil A Primary/Secondary Circuit Malfunction (Cylinder 1)
🟠 Moderate severity · drivable
Drivable, but cylinder 1 will misfire. A flashing check engine light means stop and get it towed.
What P0351 means
There's an electrical fault in the ignition coil circuit for cylinder 1, so that cylinder isn't getting proper spark.
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 the coil
- less common: Ignition driver fault in the engine computer
How to fix it
| Fix | DIY? | Typical cost |
|---|---|---|
| Replace the cylinder 1 ignition coil | Yes | $50–200 |
| Repair damaged coil wiring | Mechanic | $50–150 |
Frequently asked questions
Can I drive with a P0351 code?
Yes if the light is steady, but cylinder 1 will misfire. Stop and get a tow if the light is flashing.
What is the most common cause of P0351?
A faulty ignition coil on cylinder 1.
How much does it cost to fix a P0351?
Typically $50–$200 for a new ignition coil.
Related codes
P0301
P0301 Code: Cylinder 1 Misfire Detected
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.