Severity: Fix soon. Usually safe to drive for now.
The oxygen sensor behind the catalytic converter on bank 1 is stuck at a low voltage, which can mean the converter is not cleaning the exhaust or the sensor itself is failing.
Check for exhaust leaks, test the sensor, and check the converter's health before replacing parts.
Safe to drive, but get it checked — it can be an early sign of a failing catalytic converter.
Generally safe to drive, but get it checked soon. Safe to drive, but get it checked — it can be an early sign of a failing catalytic converter.
The most common causes are: Failed oxygen sensor; Exhaust leak; Failing catalytic converter; Wiring short. A scan tool and a visual check of the parts above is where a technician starts.
Check for exhaust leaks, test the sensor, and check the converter's health before replacing parts.
