OBD Diagnostic Trouble Code P0657 Air/Fuel Ratio Sensor Relay Circuit Malfunction

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P0657

Maker: Acura

Description: Air/Fuel Ratio Sensor Relay Circuit Malfunction

Possible causes
- Faulty Air/Fuel Ration Sensor Relay
- Air/Fuel Ration Sensor Relay harness is open or shorted
- Air/Fuel Ration Sensor Relay circuit poor electrical connection

Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)