What does code P2AF9 mean?

Q: What does code P2AF9 mean?

Starter Relay D Control Circuit High. P2AF9 means the engine control module (ECM) has detected a high voltage condition on the control circuit for starter relay D, which is the relay that supplies power to the starter motor on vehicles with multiple starter relays or a dedicated starter control module. The ECM commands the relay on by grounding its control circuit, and when the voltage on that circuit stays higher than expected, the ECM sets this code because the relay coil is not being energized as designed.

DTC codes / P2Axx · Hybrid propulsion / P2AF9

P2AF9Starter Relay D Control Circuit High

P2AF9 means the engine control module (ECM) has detected a high voltage condition on the control circuit for starter relay D, which is the relay that supplies power to the starter motor on vehicles with multiple starter relays or a dedicated starter control module. The ECM commands the relay on by grounding its control circuit, and when the voltage on that circuit stays higher than expected, the ECM sets this code because the relay coil is not being energized as designed.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaHybrid propulsion

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