OBD Code P0657

Actuator Supply Voltage “A” Circuit/Open

What’s mean?

OBD2 Code P0657 Definition:
The ECM continuously monitors its internal memory status, internal circuits, and output signals to the throttle actuator. This self?check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light.

Symptoms

Possible sumptoms of P0657
– Engine Light ON (or Service Engine Soon Warning Light) – Engine may not start

Possible Causes

Possible causes of P0657
– ECM Harness power supply circuit is open or shorted – ECM Programing – Faulty ECM The Error code is generally activated on detection of the following conditions: Indicates the ECM has experienced an internal memory fault.

Possible Solutions

– Resecure ECM connectors – Reprogram ECM – Replaced ECM