P0135 OBD II Trouble Code Oxygen O2 Sensor Heater Circuit Malfunction (Bank1, Sensor1)
Symptoms of P0135 OBD II Trouble Code
- O2 Heater element resistance is high
- Internal short or open in the heater element
- O2 heater circuit wiring high resistance
- open or short to ground in the wiring harness
Common Causes of P0135 OBD II Trouble Code
- Repair short or open or high resistance in wiring harness or harness connectors
- Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)