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B1, S1
Posted by: MP4.2+6.0 (4369) on 2016-12-11 18:39:22 In Reply to: Hmmmmm posted by PaulW on 2016-12-11 11:30:16	Share \| Report

B1 S1 should be the U.S. passenger side forward most cylinders/exhaust (B1) and S1 is always pre-cat.

Yes, seems to tie off to sensor 7 in Paul's picture.

When you have a code for broken wire though, be sure it isn't the connector on the car harness side. If it is, sensor change out will just end up being extra time and $. BTDT. From experience, that broken wire scenario is usually the outcome on the W12, as well as other W12'er experience. Happens right before or at the connector, so you splice in new leads w/ a replacement connector in that scenario. Dealer bit parts. There is a TSB on it specific to W12's. Not sure on S8 though how much that applies, if any.

Pre-cat sensors are definitely different #'s BTW--they have the heating element and extra wires for it (the heavier gauge ones) that the post cats don't.

Thread:

Oxygen sensor, open circuit B1 S1. What am I up against? 07 D3 S8. Is it hard to replace? - TomaS8 2016-12-11 00:08:31 (464 views)
- Hmmmmm - PaulW 2016-12-11 11:30:16 (879 views)
  - B1, S1 - MP4.2+6.0 2016-12-11 18:39:22 (508 views)
    - Good to know - PaulW 2016-12-12 10:55:55 (427 views)
      - Yes, VAG-COM tells me open circuit. so I'm gonna say MP4.2+6.0 is correct. Thanks BTW!  -  TomaS8  2016-12-13 01:08:39 (403 views)
        
        Then depends on which one...  -  MP4.2+6.0  2016-12-13 21:16:08 (417 views)
        
        Finally home. I will crawl into the belly of the beast and see tomorrow Monday.   -  TomaS8  2016-12-18 19:34:49 (375 views)
        
        So I took the connectors apart and inspected visually, while it's true that the.....  -  TomaS8  2016-12-19 13:56:55 (439 views)
        
        See how it goes...  -  MP4.2+6.0  2016-12-19 16:53:12 (378 views)
        
        Speakng of TSBs, isn't there a website that will tell me if there's a TSB on this for a 07 D3 S8?   -  TomaS8  2016-12-29 04:08:40 (395 views)
        
        Yes, I would also like to see a link to something like that!   -  A8 LOOONG  2016-12-20 22:15:44 (382 views)
  - Thank you very much Paul. - TomaS8 2016-12-11 12:41:35 (496 views)
    - I would have to say that's a pretty informative post! - PaulW 2016-12-11 12:49:25 (532 views)

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