P1231 BUICK Possible Causes
- Faulty fuel injector 4
- Fuel injector 4 harness is open or shorted
- Poor electrical connection in fuel injector 4 circuit
How to Fix Code P1231 BUICK?
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 BUICK Meaning
Cylinder 4 injector circuit intermittent is the generic description for code P1231 Buick, but the manufacturer may have a different description for your vehicle model and year. Currently, we do not have more information about the P1231 Buick OBDII code.