P0652 ISUZU 5 Volt Reference 2 Circuit Low Voltage

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