DTC P0155-85: O2 Sensor Heater Circuit (Bank 2 Sensor 1) - Signal above allowable range: Action
NOTE:
Monitor description.
The heated oxygen sensor heater duty cycle is at its maximum value but the sensor does not reach operating temperature
- Refer to the appropriate system wiring diagrams and check heated oxygen sensor circuit for short circuit to ground, short circuit to power, open circuit, high resistance
- Inspect connectors for signs of water ingress, and pins for damage and/or corrosion
- Clear the DTCs and retest
- Check and install new heated oxygen sensor as required