What does code P030A mean?

Q: What does code P030A mean?

Ignition A Control Signal Circuit/Open. P030A indicates that the powertrain control module has detected an open circuit or loss of continuity in the ignition coil control signal circuit for coil A, which is typically the primary ignition coil for cylinder one. The computer commands a spark event but does not see the expected electrical feedback on the control wire, so it flags the circuit as open.

DTC codes / P03xx · Ignition system and misfire / P030A

P030AIgnition A Control Signal Circuit/Open

P030A indicates that the powertrain control module has detected an open circuit or loss of continuity in the ignition coil control signal circuit for coil A, which is typically the primary ignition coil for cylinder one. The computer commands a spark event but does not see the expected electrical feedback on the control wire, so it flags the circuit as open.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaIgnition system and misfire

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.