P0657 – Actuator Supply Voltage A Circuit/Open

System

ECM

Dashboard light

Check engine light (MIL)

Check-engine blink code

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Applies to

Generic OBD-II meaning. Not every code is used by this car.

Description

Actuator Supply Voltage A Circuit/Open

Detection / symptoms

1.Check engine light on

Possible causes

1.Fault in the part or circuit named in the code

What to check

1.Check all battery and ECM power and earth connections first 2.Read every stored code; an ECM fault is rare, wiring faults are common 3.Have a specialist confirm before replacing the ECM

Confidence

medium (generic OBD-II definition, not checked against the factory manual for this car)

Generic OBD-II meaning (obd-codes.com), not checked against this car's factory manual. Clear the code and test-drive to confirm it returns. Search all fault codes · Common problems · Warning lights

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