The 135 code is for the Bank 1 or upstream O2 sensor heater circuit. The code tells you the area of failure not the part failure.
I listed below a description and possible cause for the code. It could be wiring issue, harness damage connector damage or a failing PCM.
You would need a advanced scan tool to monitor the heater operation of the sensor to determine if the heater is falling out.
Check the harness for the sensor and be sure it is not laying on anything hot causing melting or damaging wires.
P0135-1/1 02 SENSOR HEATER FAILURE
During vehicle shutdown after vehicle had been driven greater than ten miles with throttle open for a minimum of three minutes. Battery voltage greater than 11.0 volts.
O2 sensor voltage continues to rise (instead of fall) after the diagnostics has turned the ASD relay back ON. Two trip fault.
- O2 heater element.
- O2 sensor heater control circuit open.
- O2 sensor heater control circuit shorted to ground.
- ASD relay output circuit open.
- Intermittent condition.
Wednesday, April 25th, 2018 AT 5:51 AM