Powertrain
generic / SAE
P2318
Ignition Coil G Primary Control Circuit Low
The ECU reads a primary-side control voltage of ignition coil A below the expected level. The coil cannot store sufficient energy to fire the spark plug; misfire on cylinder 1 typically follows.
SystemPowertrain
Typegeneric / SAE
GroupP2
Range / number3 / 18
Possible causes
- Primary winding shorted to ground or harness chafed high
- Coil G internal driver fault medium
- Connector pins corroded - high contact resistance low
Inspection / repair
- Difficulty: easy
- DIY: possible
- Estimated cost: 60–280 €
- Estimated time: 0.4–1.2 h
- Component: ignition coil g
- Component: ignition coil wiring g
- Component: ignition module
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012