OBD-II code · Powertrain (generic)
P0351 Ignition Coil "A" Primary/Secondary Circuit Malfunction (Cylinder 1)
An electrical fault is detected in both the primary and the secondary circuit of ignition coil A (cylinder 1). The ECU cannot drive the coil correctly, so the cylinder served by coil A misfires or does not fire at all. Causes: an open or shorted primary control wire, an internal coil winding fault, a failed igniter/driver, or wiring or connector damage at the coil.
Is it safe to drive with P0351?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyCoil primary winding open or shorted
- PossibleWiring or connector fault
Repair at a glance
- Difficulty
- Easy
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.2–1.5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Ignition Coil, Ignition Coil Wiring, Ecu Ignition Driver
Related codes
- P0301Cylinder 1 Misfire Detected
- P0352Ignition Coil "B" Primary/Secondary Circuit Malfunction (Cylinder 2)
- P0353Ignition Coil "C" Primary/Secondary Circuit Malfunction (Cylinder 3)
- P0354Ignition Coil "D" Primary/Secondary Circuit Malfunction (Cylinder 4)
- P034BCrankshaft Position Sensor - Crankshaft Direction Incorrect
- P034CIon Sense System Performance
- P0350Ignition Coil Primary/Secondary Circuit/Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.