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P0420 CEL fix rear 02 sensor

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Old Feb 25, 2010, 02:17 PM
  #76  
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Originally Posted by HR2L
Hey tephra Im still getting the good ol P0140. I was the MR that Bryan attempted to disable (about 3 weeks ago), but it was of no success. Any word on when this might be a fix? Would greatly appreciate it, as its getting kinda of old having to erase it every 40 or so miles. I have tried even a mechanical fix with no prevail.
Do you have a wide band? If you do follow this link.

https://www.evolutionm.net/forums/ev...ut-serial.html
It worked for me.
Old Feb 25, 2010, 05:59 PM
  #77  
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Originally Posted by Huge
Do you have a wide band? If you do follow this link.

https://www.evolutionm.net/forums/ev...ut-serial.html
It worked for me.
I guess that's confirmation that it's still working for you then
Old Feb 25, 2010, 09:33 PM
  #78  
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Originally Posted by rogue
I should note that my Rear 02 is disconnected also.
so did it work?!

Originally Posted by Huge
Do you have a wide band? If you do follow this link.

https://www.evolutionm.net/forums/ev...ut-serial.html
It worked for me.
this better ****ing work for me or i swear i'll drop kick a small child!
Old Feb 27, 2010, 06:28 AM
  #79  
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Originally Posted by criptballer
so did it work?!



this better ****ing work for me or i swear i'll drop kick a small child!

will let you know tomorrow...
Old Feb 27, 2010, 02:42 PM
  #80  
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so it didnt work for me..... whenever i try to log the afr from the rear sensor it keeps giving lower numbers than actual afr from my wideband. but at least i know its seeing some voltage. so i've tried a couple of different options with the dtc off, bit 1 off, still came on. dtc on, bit 1 off, still came on. dtc on bit on and now i'm getting a p0037 code. i'm gonna try dtc off bit on to see what happens.
Old Oct 8, 2010, 06:34 AM
  #81  
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Any upates on what worked and what didn't for these P0420 codes and P0139 codes?
Old Oct 8, 2010, 01:45 PM
  #82  
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<shrug>
I've been CEL free for a long *** time with what I mentioned before. Follow the tutorial on Wideband through the ECU, then disable P0139.

I've done this on multiple Xs, all with good result.
Old Oct 8, 2010, 03:04 PM
  #83  
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Originally Posted by xPRimNT
<shrug>
I've been CEL free for a long *** time with what I mentioned before. Follow the tutorial on Wideband through the ECU, then disable P0139.

I've done this on multiple Xs, all with good result.
I may have to go that route as disabling P0139/P0140 caused a CEL as did disabling that plus the ECU Options 2/bit 1. Right now I'm testing just the ECU Options 2/bit 1 set to 0 to see if it will play nice.
Old Aug 25, 2011, 07:08 AM
  #84  
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did it work tho?

Omar
Old Sep 20, 2011, 11:19 AM
  #85  
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I have the same problem with my new tune. Is F annoying that everything time come up. What can i do get rid or it ??? i hear about the AMS spacer too will that work ???
Old Oct 9, 2011, 06:02 PM
  #86  
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Since I changed my DP test pipe I'm getting it too.
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