P1231 CADILLAC Possible Causes
- Faulty fuel injector 4
- Fuel injector 4 harness is open or shorted
- Fuel injector 4 circuit poor electrical connection
How to Fix Code P1231 CADILLAC?
Start by checking the “possible causes” listed above. Visually inspect the corresponding wiring harness and connectors. Look for damaged components and check for broken, bent, pushed out, or corroded connector pins.
Possible Symptoms
- Engine light on (or service engine soon warning light)
P1231 CADILLAC Meaning
Injector Circuit Cylinder 4 Intermittent is the generic description for code P1231 Cadillac, but the manufacturer may have a different description for your vehicle model and year. Currently, we have no further information about Cadillac OBDII code P1231.