What does code P05B3 mean?

Q: What does code P05B3 mean?

Active Grille Air Shutter B Control Circuit High. P05B3 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the active grille air shutter 'B' actuator. The PCM commands the shutter to move, but the feedback signal on the control circuit remains above the expected threshold, suggesting an open circuit, a short to voltage, or a faulty actuator.

DTC codes / P05xx · Vehicle speed, idle control and auxiliary inputs / P05B3

P05B3Active Grille Air Shutter B Control Circuit High

P05B3 indicates that the powertrain control module (PCM) has detected an abnormally high voltage on the control circuit for the active grille air shutter 'B' actuator. The PCM commands the shutter to move, but the feedback signal on the control circuit remains above the expected threshold, suggesting an open circuit, a short to voltage, or a faulty actuator.

SystemPowertrain

Code typeGeneric (all makes)

SeverityLow

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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