OBD codes / P0131
P0131
ModerateO2 Sensor Circuit Low Voltage (Bank 1 Sensor 1)
Get it looked at soon to avoid further wear.
Likely causes
- faulty O2 sensor
- exhaust leak
- wiring
Common fixes
- replace O2 sensor
- fix exhaust leak
Seeing P0131 on your car? Get a diagnosis specific to your exact year, make and model.
Diagnose P0131 for my vehicleGeneric OBD-II reference. Manufacturer-specific behavior varies — confirm with a scan tool and, for safety-related codes, a professional inspection.