P1239 ISUZU Possible Causes
- Faulty high-pressure fuel regulator
- High-pressure fuel regulator harness is open or shorted
- Poor electrical connection in the high-pressure fuel regulator circuit
How is the P1239 ISUZU code repaired?
Start by checking the “Possible Causes” listed above. Visually inspect the wiring harness and related connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or service engine soon warning light)
P1239 ISUZU Meaning
Fuel high-pressure system malfunction is the generic description for the P1239 Isuzu code, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information on the P1239 Isuzu OBDII code.