95.5-2004 Tacomas & 96-2002 4Runners 4th gen pickups and 3rd gen 4Runners

Cel code: H02S12

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Old Sep 22, 2010 | 06:04 PM
  #1  
TFJ-4runner's Avatar
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From: Newnan, GA - Stillwater, OK
Exclamation Cel code: H02S12

Definition
Heated oxygen sensor - bank 1 sensor 2 (HO2S12) circuit fault *P0136*

Probable cause:
- Open or short circuit condition
- Poor electrical connection
- Engine mechanical fault
- EFI relay fault
- Faulty heated oxygen sensor - bank 1 sensor 2


Just got this code on the way home tonight coming from the bank. It's on the 96 I recently just purchased 5VZFE. Before I go into searching for the exact culprit does anyone have experience with this code and how did you fix it.


Thanks in advance,

TFJ

Last edited by TFJ-4runner; Sep 22, 2010 at 06:11 PM.
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Old Sep 22, 2010 | 06:30 PM
  #2  
TFJ-4runner's Avatar
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From: Newnan, GA - Stillwater, OK
Pretty sure I found what I need but any input is still welcomed.

http://www.ncttora.com/fsm/2003/Repa...fe/cip0136.pdf
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