P0155-85: O2 Sensor Heater Circuit (Bank 2 Sensor 1) - Signal above allowable range: Action
- Refer to the applicable SYSTEM WIRING DIAGRAM(S) 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
- Using the manufacturer approved diagnostic system clear all stored DTCs using the `Diagnosis Menu' tab and retest
- Check and install a new heated oxygen sensor as required