Trouble codes › P0351
P0351 Ignition Coil "A" Primary/Secondary Circuit
Ignition and misfire
P0351 means there's a fault in ignition coil A's circuit (usually cylinder 1), so that cylinder may misfire.
The engine computer has found a problem in the circuit for ignition coil A, which on most engines fires cylinder 1. The coil may not be firing.
Expect a misfire on that cylinder. If the check-engine light flashes, stop driving to protect the catalytic converter; otherwise get it fixed soon.
Common causes
- A failed ignition coil
- An unplugged, loose or corroded coil connector
- Damaged wiring to the coil
- A coil driver problem in the engine computer (rare)
Symptoms
- Misfire on one cylinder (often with P0301)
- Rough idle, loss of power
- Check-engine light
What to check first
- Check the coil's connector and wiring.
- Swap the coil with another cylinder and see whether the code moves (to P0352, for example).
- Check for power at the coil connector with the key on.
- Replace the coil if the fault follows it.
What does P0351 mean on your vehicle?
The likely cause depends on your engine. iRepair researches your exact year, make, model and engine (service bulletins, recalls and owner reports) and tells you what to check first. Your first 3 questions are free.
Ask iRepair about P0351No scanner? Most auto parts stores read check-engine codes for free.
Related codes
General guidance for P0351 on most vehicles. Some makers use the same code a little differently; confirm in the service information for your vehicle, put safety first, and see a professional when in doubt.