P1639 ISUZU – Reference Voltage 2 Circuit Fault

 

P1639 ISUZU Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P1639 ISUZU Possible Causes

 

Engine Control Module (ECM) poor electrical connection,Shorted sensor,Faulty ECM

 

P1639 ISUZU Description

 

Reference Voltage 2 Circuit Fault is the generic description for the P1639 Isuzu code, but the manufacturer may have a different description. Currently we have no further information abouth the P1639 Isuzu OBDII code.