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P0651 Diagnostic Trouble Code Discussion for June 2021

5-Volt Reference 2 Circuit Malfunction

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Trouble Ticket Help Requests for DTC P0651
Help Request Posted
2012 Chevrolet Equinox LT 2.4L Stall, MIL Lamp on VIN: 2GNALDEK3C
P0651: Ref 2 voltage. ... with concern about mil light on stalling/hard to start very intermittent, Code p0651 ref voltage. The wiring diagram I have shows the Ref 2 voltage and all the wires for the CKP sensor go directly to ECM. There is 5.5 volts on scanner pid as well as at...
June 11, 2021