Powertrain
generic / SAE
P031A
Ignition C Control Signal Circuit/Open
The ignition C control signal circuit is open — typically the PCM drive line for the first ignition coil group has lost continuity.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number3 / 1A
Possible causes
- Open wire between PCM and coil high
- Pin pushed back out of connector body low
- Cracked solder joint inside the module or sensor low
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–500 €
- Estimated time: 0.5–2.5 h
- Component: ignition coil
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012