Error code
OBD2 P0351
OBD2P0351
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.
What it means
Ignition Coil 'A' Primary/Secondary Circuit.
Severity
moderateCan drive, but may experience poor performance and potential damage to other components.
Summary
P0351 indicates an ignition coil 'A' primary/secondary circuit malfunction in cylinder 1 of your vehicle's engine.
Symptoms
- Illuminated check engine light
- Ignition misfire
Common Causes
- Faulty ignition coil
- Problem in the ignition coil circuit
- Issue with the PCM
Diagnosis
- Visually inspect the coil pack and its connector for any broken wires or corrosion.
- Swap the faulty cylinder's ignition coil with another cylinder’s coil to determine if the issue is with the coil itself or the control circuit.
- Test the resistance of the primary and secondary circuits using a digital multimeter.
- Check for power supply issues by testing voltage at the coil connector.
- Inspect continuity between the PCM and the faulty coil.
Fixes
- Replace the faulty ignition coil or repair wiring issues as needed.
FAQ
What does P0351 mean?
P0351 indicates a malfunction in the primary/secondary circuit of cylinder 1's ignition coil.
How do I diagnose P0351?
Diagnose by visually inspecting, swapping coils, testing resistance and voltage, and checking continuity between the PCM and faulty coil.
Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.
More OBD2 codes
- P0300Random/Multiple Cylinder Misfire Detected
- P0301Cylinder 1 Misfire Detected
- P0302Cylinder 2 Misfire Detected
- P0303Cylinder 3 Misfire Detected
- P0304Cylinder 4 Misfire Detected
- P0305Cylinder 5 Misfire Detected
- P0306Cylinder 6 Misfire Detected
- P0307Cylinder 7 Misfire Detected
- P0308Cylinder 8 Misfire Detected
- P0309Cylinder 9 Misfire Detected
- P0310Cylinder 10 Misfire Detected
- P0311Cylinder 11 Misfire Detected