P1639
Powertrain Codes
P1639 - ISUZU - Reference Voltage 2 Circuit Fault
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- Engine Control Module (ECM) poor electrical connection - Shorted sensor - Faulty ECM
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
Possible Causes
- Engine Control Module (ECM) poor electrical connection - Shorted sensor - Faulty ECM