glee29 Posted February 6, 2006 Share Posted February 6, 2006 The CEL in my 2002 OBW (AT) came on couple times last week and the code read P0138 (O2 sensor-High Voltage-Bank 1 Sensor 2). I have Borla headers with Stromung cat-back and mid-pipe installed over a year ago. To avoid O2 sensor problems, I also installed a spacer in the rear O2 sensor. Any idea? Would replacing the sensor (front or rear) get rid of the problem? Thanks :-\ Quote Link to comment Share on other sites More sharing options...
friendly_jacek Posted February 6, 2006 Share Posted February 6, 2006 "To avoid O2 sensor problems" ...Apparently, didn't work Quote Link to comment Share on other sites More sharing options...
TheBrian Posted February 7, 2006 Share Posted February 7, 2006 Are you sure no air is getting in between the engine and the second O2 sensor? That can cause a CEL, too. What's the spacer look like? Maybe try removing it. Any idea how old the O2 sensor is? However unlikely, it's possible the sensor genuinely is worn out. Quote Link to comment Share on other sites More sharing options...
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