DTC P0140-23: O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) - Signal stuck low: Action
WARNING: This page is about a different car, the 2015 Jaguar XF, 2014 Jaguar XF, and 2013 Jaguar XF. However, it is still accessible from the selected car via links, so may be relevant.
- Check heated oxygen sensor is correctly installed on catalyst
- Refer to applicable SYSTEM WIRING DIAGRAM(S) and check the heated oxygen sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Check for air leakage between catalyst and exhaust manifold flange
- Check heated oxygen sensor for tip contamination by excessive oil consumption. Carry out oil consumption check
- Check heated oxygen sensor for tip contamination by poor or incorrect fuel. Check customer is using correct grade of fuel
- Check and install new heated oxygen sensor as required