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 lower than expected

Symptoms

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

P0642 Information for specific makes

P0642 AUDI
P0642 CHRYSLER
P0642 DODGE
P0642 FORD
P0642 HYUNDAI
P0642 ISUZU
P0642 JEEP
P0642 KIA
P0642 MITSUBISHI
P0642 SUZUKI
P0642 VOLKSWAGEN