Possible causes

– Faulty Engine Control Module (ECM)
– ECM harness is open or shorted
– ECM circuit poor electrical connection
– Shorted sensor on 5 volt circuit

When is the code detected?

The Engine Control Module (ECM) has detected the sensor 5 volt reference circuit voltage is higher or lower than expected

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0651 Information for specific makes

P0651 ACURA
P0651 CADILLAC
P0651 CHEVROLET
P0651 CHRYSLER
P0651 DODGE
P0651 GMC
P0651 HONDA
P0651 HYUNDAI
P0651 ISUZU
P0651 JEEP
P0651 KIA
P0651 SUZUKI
P0651 VOLKSWAGEN