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Replace the oxygen sensor behind the engine - grey connector.
in the exhaust manifold toward the firewall its the hard one!!!
02 sensor heater curcuit malfunction (bank 1 sensor1)---change front 02 sensor if need be.
Trouble code P0135 means:O2 sensor heater circuit malfunction (bank 1,sensor 1)
That is the code fot the O2 sensor. Usually fails at or around 100k. Need to get it fixed to clear most inspections.
Trouble code P0135 means:O2 sensor heater circuit malfunction (bank 1,sensor 1)
Trouble code P0135 means: HO2S Heater Performance Sensor 1 Trouble code P0420 means: Catalyst System Low Efficiency (Bank 1)
the po420 could also be a misfire or vacuum leak
O2 sensor heater circuit malfunction (bank 1 sensor 1). You probably have a burned out Bank 1 Sensor 1 O2 sensor. Also check the wiring at the sensor for damage.
You have one of three general problems in order of most to least likely.The O2 sensor is badThe wiring or connections have an issueThe computer is bad and not seeing the operation of the heater.
You have one of three general problems in order of most to least likely.The O2 sensor is badThe wiring or connections have an issueThe computer is bad and not seeing the operation of the heater.
If you changed the right one the one before the converter then it should go off but you must erase it from the OBD yourself using a scan tool or taking it to somebody.