Severity: Fix within days. Drive with caution and watch for new symptoms.
The first oxygen sensor on bank 1 is not changing its signal at all, which usually means the sensor is dead or its heater is not working.
Check the heater fuse and wiring, then replace the sensor.
Fuel economy drops and the engine may run rough. Drivable with care.
You can drive short distances carefully; watch for worsening symptoms. Fuel economy drops and the engine may run rough. Drivable with care.
The most common causes are: Failed oxygen sensor; Failed sensor heater circuit; Damaged wiring or connector; Blown fuse. A scan tool and a visual check of the parts above is where a technician starts.
Check the heater fuse and wiring, then replace the sensor.
