Raptor 22 Posted August 5, 2003 Share Posted August 5, 2003 P0135 O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1) read by Auto Zone. How reliable? Where is sensor located. Sorry, I have not had a chance to work on the wife's '94 ES-300 yet and now the code has set. Checked gas cap - tight. Have a factory manual set and Scan Tool for my laptop on the way (hurry mr UPS) Quote Link to comment Share on other sites More sharing options...
SKperformance Posted August 5, 2003 Share Posted August 5, 2003 that should be the o2 sensor at the rear of the engine by the firewall as per jpi that is the first bank Quote Link to comment Share on other sites More sharing options...
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