caseyctsv Posted October 21, 2007 Report Share Posted October 21, 2007 I know this code is most likely an O2 sensor. It says it is for "Bank 1". Which side is this - driver or passenger? I had planned on replacing both O2 sensors on whichever side this is. Quote Link to comment Share on other sites More sharing options...
V8 Beast Posted October 21, 2007 Report Share Posted October 21, 2007 You still have all 4? Edit: Here ya go... http://i70.photobucket.com/albums/i89/xxtheonlyxx/o2sensors.jpg Quote Link to comment Share on other sites More sharing options...
Ramsey Posted October 21, 2007 Report Share Posted October 21, 2007 buy from gm, do not buy bosch. Quote Link to comment Share on other sites More sharing options...
skold Posted October 21, 2007 Report Share Posted October 21, 2007 p0420 is a catalysts below thesehold code its normally a cat problem, at least in my experiance at lexus, most o2/afs are heater/circuit malfunctions like p1135. look at freeze frame data, do your o2 sensors move upa nd down together like does one mimic the other? Quote Link to comment Share on other sites More sharing options...
04silvrz Posted October 24, 2007 Report Share Posted October 24, 2007 It's 4:20 right now... Quote Link to comment Share on other sites More sharing options...
Guest crazylady Posted October 24, 2007 Report Share Posted October 24, 2007 P0420 = Put the blunt down and step away from the vehicle!!!!! Quote Link to comment Share on other sites More sharing options...
AJ Posted October 24, 2007 Report Share Posted October 24, 2007 Bank 1 is the drivers side. P0420 is a low cat efficiency, if you still have the cats then they need replaced. Quote Link to comment Share on other sites More sharing options...
Clifford Automotive Posted October 27, 2007 Report Share Posted October 27, 2007 Bank 1 = drives side. Quote Link to comment Share on other sites More sharing options...
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