P0351 — Ignition Coil A Primary/Secondary Circuit Malfunction
Category: Powertrain Severity: High
Updated:
DTC code P0351 means: Ignition Coil A Primary/Secondary Circuit Malfunction. It falls under the "Powertrain" category, with an estimated severity of High. Common causes include failed cylinder 1 ignition coil, loose or corroded coil connector and damaged wiring; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed cylinder 1 ignition coil
- Loose or corroded coil connector
- Damaged wiring
- ECU driver fault
Symptoms
- Misfires (shaking)
- Loss of power
- Check engine light, sometimes flashing
- Higher fuel consumption
How to diagnose it step by step
- Check the coil connector.
- Swap coils between cylinders.
- Check supply and trigger signal.
- Replace the faulty coil.
How to fix it
Swap coil A with another cylinder's coil: if the fault moves, the coil is bad. If it doesn't, check the connector and wiring.
Estimated repair cost
Coil: $40–150; $60–220 installed.
Frequently asked questions
What does DTC code P0351 mean?
Ignition Coil A Primary/Secondary Circuit Malfunction.
Is code P0351 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P0351?
Avoid it if the light is flashing: unburned fuel can destroy the catalytic converter.
Related codes
P0352 P0353 P0354 P0355 P0356 P0345 P0344 P0341 P0340 P0365
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