OBD codes / P0271
P0271
ModerateCylinder 4 Injector Circuit High
Get it looked at soon to avoid further wear.
Likely causes
- open or high resistance in the injector circuit
- faulty injector
- wiring/connector fault
Common fixes
- inspect the cylinder 4 injector wiring
- replace the injector if faulty
Seeing P0271 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0271 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.