The P0657 trouble code indicates an open circuit in the actuator supply voltage “A” circuit. This circuit supplies power to various actuators, such as solenoids or motors, controlled by the engine control module (ECM) or powertrain control module (PCM). If the ECM or PCM detects an open circuit in this voltage supply circuit, it will trigger this trouble code.
P0657 Actuator Supply Voltage “A” Circuit/Open
Code symptoms P0657.
1. Illumination of the Check Engine Light (CEL).
2. Other related trouble codes may be present.
3. Engine performance issues, such as stalling or rough idling.
4. Inoperative actuators or components controlled by the affected circuit.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0657.
1. Open circuit or broken wire in the actuator supply voltage “A” circuit.
2. Corrosion or damage to connectors or terminals in the circuit.
3. Faulty ECM or PCM.
Code Solutions P0657.
1. Inspect the wiring harness, connectors, and terminals in the actuator supply voltage “A” circuit for any signs of damage, corrosion, or breaks. Repair or replace damaged components as necessary.
2. Clear the trouble codes and perform a test drive to verify if the issue persists. If the code returns, further diagnosis may be required.
3. Check the voltage supply at the affected actuator or component using a multimeter to ensure proper voltage is reaching the component when the circuit is energized.
4. If no issues are found with the wiring, connectors, or voltage supply, the ECM or PCM may be faulty and require replacement.
5. Follow manufacturer-specific diagnostic procedures outlined in the vehicle’s service manual to accurately diagnose and repair issues related to the actuator supply voltage “A” circuit. If needed, seek assistance from a qualified technician or dealership.