OBD codes / P0133
P0133
ModerateO2 Sensor Circuit Slow Response (Bank 1 Sensor 1)
Get it looked at soon to avoid further wear.
Likely causes
- aging O2 sensor
- exhaust leak
- contaminated sensor
Common fixes
- replace O2 sensor
- inspect exhaust
Seeing P0133 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0133 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.