OBD-II code · Powertrain (generic)
P030A Ignition A Control Signal Circuit/Open
Ignition A Control Signal Circuit/Open: the circuit is open. This line drives an ignition coil group; a fault causes misfire on those cylinders.
Is it safe to drive with P030A?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOpen wire between PCM and coil
- Less likelyPin pushed back out of connector body
- Less likelyCracked solder joint inside the module or sensor
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Ignition Coil, Powertrain Control Module
Related codes
- P030DIgnition B Control Signal Circuit/Open
- P031AIgnition C Control Signal Circuit/Open
- P031DIgnition D Control Signal Circuit/Open
- P035AIgnition E Control Signal Circuit/Open
- P035DIgnition F Control Signal Circuit/Open
- P036AIgnition G Control Signal Circuit/Open
- P036DIgnition H Control Signal Circuit/Open
- P038AIgnition I Control Signal Circuit/Open
- P038DIgnition J Control Signal Circuit/Open
- P03FAIgnition K Control Signal Circuit/Open
- P03FDIgnition L Control Signal Circuit/Open
- P0307Cylinder 7 Misfire Detected
- P0308Cylinder 8 Misfire Detected
- P0309Cylinder 9 Misfire Detected
- P030BIgnition A Control Signal Circuit Low
- P030CIgnition A Control Signal Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.