OBD codes / P0203
P0203
ModerateInjector Circuit/Open - Cylinder 3
Get it looked at soon to avoid further wear.
Likely causes
- faulty injector
- wiring or connector fault
Common fixes
- test the cylinder 3 injector and wiring
- replace the injector if open
Seeing P0203 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0203 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.