OBD-IIIgnition & Misfire
Ignition & Misfire Fault Codes
Spark plug, ignition coil, and cylinder misfire fault codes.
Ignition & Misfire Codes (6)
P0351Ignition Coil A Primary/Secondary Circuit MalfunctionP0352Ignition Coil B Primary/Secondary Circuit MalfunctionP0353Ignition Coil C Primary/Secondary Circuit MalfunctionP0354Ignition Coil D Primary/Secondary Circuit MalfunctionP0355Ignition Coil E Primary/Secondary Circuit MalfunctionP0356Ignition Coil F Primary/Secondary Circuit Malfunction
Diagnostic Approach — Ignition & Misfire
- 1
Identify which cylinder(s) are misfiring from the specific P030x code.
- 2
Swap ignition coil to adjacent cylinder — if misfire follows, coil is faulty.
- 3
Inspect spark plug for fouling, wear, or damage.
- 4
Perform compression test — low compression indicates mechanical issue.
- 5
Check injector pulse with noid light if coil and plug test good.
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