cb2big4u Posted July 29, 2012 Report Share Posted July 29, 2012 So I noticed that I have code p0420 and p0430 which is catalyst efficiency below threshold on banks 1 & 2. I have no cats and had Justin tune out my sensors. What could be doing this? Sent from my Rezound using Tapatalk 2 Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted July 30, 2012 Author Report Share Posted July 30, 2012 Anyone? Lean tuning? How to test O2 sensors to see if they are bad? Quote Link to comment Share on other sites More sharing options...
The_aSSet Posted July 30, 2012 Report Share Posted July 30, 2012 Which sensors? Front or back? Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted July 30, 2012 Author Report Share Posted July 30, 2012 That's what I'm not sure of. I guess black bear removed the back ones from the computer. Could I take the back ones that are still there and swap them around? Quote Link to comment Share on other sites More sharing options...
The_aSSet Posted July 30, 2012 Report Share Posted July 30, 2012 Not sure if they're the same part number but if they are yea I'd do that Quote Link to comment Share on other sites More sharing options...
Fireman31 Posted July 30, 2012 Report Share Posted July 30, 2012 Front and rear 02s are different part numbers......those codes are post-cat codes, my guess is that he forgot to remove them from the tune.... Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted July 31, 2012 Author Report Share Posted July 31, 2012 Front and rear 02s are different part numbers......those codes are post-cat codes, my guess is that he forgot to remove them from the tune.... Man thats wierd. Because after I had removed my cats a year that light was on and finally got the new tune and it went away untill just recently. I will contact my tuner and check it out. I also did wash my motor recently but only with a light trickle of water and everything seemed fine. Code for bank 1 was there before doing so and bank 2 popped up just recently. I did pull a code for a right front speed sensor at the same time of the O2 codes that wasnt there before doing the wash. Quote Link to comment Share on other sites More sharing options...
ls2silvy Posted July 31, 2012 Report Share Posted July 31, 2012 He just forgot to turn them off Quote Link to comment Share on other sites More sharing options...
cb2big4u Posted July 31, 2012 Author Report Share Posted July 31, 2012 I will give that a shot. Thanks yall! Quote Link to comment Share on other sites More sharing options...
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