P0359
PowertrainIgnition Systemhigh severityIgnition Coil I Primary/Secondary Circuit Malfunction
What P0359 Means
The PCM detected a fault in the primary or secondary circuit of ignition coil I (cylinder 9). Spark delivery to that cylinder is compromised, causing a misfire.
Symptoms
- Engine misfire
- Rough idle
- Loss of power
Common Causes
- Faulty ignition coil
- Damaged coil wiring or connector
- Poor coil ground
- Failed PCM coil driver
Diagnostic Steps
- Scan for related misfire codes
- Inspect coil I connector and wiring
- Swap coil I with another cylinder to test
- Measure coil primary/secondary resistance
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