OBD codes / P0173
P0173
ModerateFuel Trim Malfunction (Bank 2)
Get it looked at soon to avoid further wear.
Likely causes
- vacuum leak on bank 2
- dirty MAF
- fuel delivery problem
Common fixes
- check for vacuum leaks
- clean the MAF and check fuel pressure
Seeing P0173 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0173 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.