Ignition Coil G Primary Control Circuit High

Common Symptoms

• Cylinder 7 misfire detected
• Check Engine Light on
• Engine vibration at idle
• Sluggish acceleration
• Elevated exhaust emissions

Probable Causes (Ranked by Likelihood)

• Short circuit in coil G wiring Very High
• Internally shorted ignition coil G High
• Water in coil G spark plug well Moderate
• ECM coil driver output fault Low

Step-by-Step Diagnostic Procedure

1. Check spark plug well for water or oil

2. Swap coil G to verify the fault follows the coil

3. Inspect wiring for abrasion or heat damage

4. Measure coil G resistance

5. Check for intake manifold leaks that could allow moisture into plug wells

Frequently Asked Questions