Rick's Free Auto Repair Advice

P0135

Fix code P0135

Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 1). This sensor is located on the engine bank that houses #1 cylinder and is located BEFORE the catalytic converter

When you turn the ignition switch to RUN, power is provided to the heater circuit of the oxygen sensor. The heater gets its ground from the PCM so it can monitor heater operation. If the heater doesn’t return ground to the PCM, it sets trouble code P0135

Most common causes are: Blown fuse, short to ground, dead heater in sensor, bad ground wire between sensor and PCM.

oxygen sensor, P0130

oxygen sensor wire colors

To learn how to replace an oxygen sensor, click here

 

© 2012 Rick Muscoplat

Posted on by Rick Muscoplat


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