prashanthchou Posted March 14, 2011 Share Posted March 14, 2011 - I have a Lexus ES 300 - 2002 model - It has 93K miles - Engine Check light is ON I went to get my emission test and they said my car failed and they gave an error code as "P1135" - How easy is it to fix it ? - Can it be fixed my self ? ( I am not an expert, but can give a try if its an easy fix ) - Or is it better to take to a dealer ?( I know they rip off with charges), any other recommendations ? - How much would it be to fix this P1135 error code ? Quote Link to comment Share on other sites More sharing options...
Ray Garlington Posted March 14, 2011 Share Posted March 14, 2011 The bank 1 oxygen sensor is on the back of the engine near the firewall. It can be replaced fairly easily; however, access is somewhat restricted and may be frustrating to an inexperienced mechanic. The cost of this can be as low as $50 (DIY) or as much as $200 (perhaps more at a dealer). Quote Link to comment Share on other sites More sharing options...
Lexlogic Posted March 18, 2011 Share Posted March 18, 2011 Denso AF oxygen sensor cost $72.99 ea Click here I manage to replace both sensor. the one to the firewall is a little difficult. I was directly on top of the engine to disconnect the wire harness and went underneath for the sensor. Alot of back pain but save alot of money. Quote Link to comment Share on other sites More sharing options...
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