Bad 02 sensors?

[sliderr]

Hi all, I have a my1997 boxter LHD with 32000 Miles, my oilfill tube was cracked and porsche replaced this under warrenty, after about 250Miles my CEL was burning, i could see on the PWIS tool of the dealer that one 02 sensor was not working at all bank 2 after cat , so porsche replaced this ($600), i drove 150 miles and again the CEL, went back again and they did a full diagnose MAF was ok, power was ok, on my car but couldnt find any issue although my car was now reporting both bank cylinder 1-3 and 4 to 6 faulty or near limit, they resetted this with a pull of the accuc onnector ...today again my CEL burned, i have resetted this by pulling the accu cable and it was driving a little rough but after 50 miles seems ok now..does anyone have any idea what this fault can be? Can it hurt to leave this as i am afraid to go back to the dealer as they only want to replace parts like my o2 sensor which i think wasn't even faulty now...

I have bought the durametric software and cable for $150 on ebay so i am able to read out my car soon but any help would very welcome what i can check upfront before i go back to the (st)(d)ealer......

Any advice what to do is welcome, i am a newbie in this so please be gentle...i have not changed anything on my car like airfilters etc, and its just out of warrenty ..

[kbrandsma]

Hi all, I have a my1997 boxter LHD with 32000 Miles, my oilfill tube was cracked and porsche replaced this under warrenty, after about 250Miles my CEL was burning, i could see on the PWIS tool of the dealer that one 02 sensor was not working at all bank 2 after cat , so porsche replaced this ($600), i drove 150 miles and again the CEL, went back again and they did a full diagnose MAF was ok, power was ok, on my car but couldnt find any issue although my car was now reporting both bank cylinder 1-3 and 4 to 6 faulty or near limit, they resetted this with a pull of the accuc onnector ...today again my CEL burned, i have resetted this by pulling the accu cable and it was driving a little rough but after 50 miles seems ok now..does anyone have any idea what this fault can be? Can it hurt to leave this as i am afraid to go back to the dealer as they only want to replace parts like my o2 sensor which i think wasn't even faulty now...

I have bought the durametric software and cable for $150 on ebay so i am able to read out my car soon but any help would very welcome what i can check upfront before i go back to the (st)(d)ealer......

Any advice what to do is welcome, i am a newbie in this so please be gentle...i have not changed anything on my car like airfilters etc, and its just out of warrenty ..

Hallo,

If the CEL is not blinking you are ok. When you get the code(s) report back and we'll see what the issue is.

[sliderr]

Guys this is the error Motronic 5.2.2 Current Porsche fault code 35 ?

Hi all, I have a my1997 boxter LHD with 32000 Miles, my oilfill tube was cracked and porsche replaced this under warrenty, after about 250Miles my CEL was burning, i could see on the PWIS tool of the dealer that one 02 sensor was not working at all bank 2 after cat , so porsche replaced this ($600), i drove 150 miles and again the CEL, went back again and they did a full diagnose MAF was ok, power was ok, on my car but couldnt find any issue although my car was now reporting both bank cylinder 1-3 and 4 to 6 faulty or near limit, they resetted this with a pull of the accuc onnector ...today again my CEL burned, i have resetted this by pulling the accu cable and it was driving a little rough but after 50 miles seems ok now..does anyone have any idea what this fault can be? Can it hurt to leave this as i am afraid to go back to the dealer as they only want to replace parts like my o2 sensor which i think wasn't even faulty now...

I have bought the durametric software and cable for $150 on ebay so i am able to read out my car soon but any help would very welcome what i can check upfront before i go back to the (st)(d)ealer......

Any advice what to do is welcome, i am a newbie in this so please be gentle...i have not changed anything on my car like airfilters etc, and its just out of warrenty ..

Hallo,

If the CEL is not blinking you are ok. When you get the code(s) report back and we'll see what the issue is.

[Loren]

Looks like you still have an air leak.

Check the AOS and the bellows below the AOS for leaks - as well as all intake connections.

[sliderr]

Another stupid question what is AOS ?

Looks like you still have an air leak.

Check the AOS and the bellows below the AOS for leaks - as well as all intake connections.

[Loren]

Air Oil Separator - you will find many discussions here about it's failure and replacement.

[sliderr]

Air Oil Separator - you will find many discussions here about it's failure and replacement.

Ok it's still at the (st)(d)ealer at the moment, I tried to let them call me back as they told me they want to replace the cats !! I thought OMG they have no idea what ther are doing ...even i am wondering if i have to pay for all of this as they CEL came on when it was still in warrenty .anyways, I will try to let your suggestion to end up at the mechanic and see what he will say...I cant believe this is happening with only 33K on the clocks!

Edited March 21, 2011 by sliderr

[Loren]

Porsche Fault 35 = (both)

P1125 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Lean Threshold

P1126 Oxygen Sensing Adaptation Area 1 (Cylinders 4 - 6) - Rich Threshold

Possible causes:

- Intake air system leaking.

- Fuel pressure too low or too high.

- Volume supply of fuel pump too low.

- Fuel injectors fouled or leaking

- EVAP canister purge valve open.

You need the specific Pcode to nail this fault down.

I don't see anything here that points to the cats.

[kbrandsma]

Air Oil Separator - you will find many discussions here about it's failure and replacement.

Here is a picture of the AOS from the top of the engine bay.

Here is the bellows (accordian hose about 1.5cm to 2.0cm in diameter). It is located at the bottom of the AOS

Edited March 22, 2011 by kbrandsma

[sliderr]

And the saga continues ...... ok got a call from my dealer they have measured everything, put the engine on a vacuum but they cannot find anything leaking they said, they swapped out the AOS and drove with it 100 miles but still it seems to be against the border of the threshold , he is still about to replace my cats as before the cats are the values ok(??) but still trowing in code 35 ,can anyone tell me what the limits are for my car ? they are looking but have no reference material as they dont have any US cars at hand.....?

[sliderr]

Today got my car back, porsche replaced the MAF with a 996 one, the values before the cats are ok acoording to porsche after the cats is near limits.. the best thing is they didnt charge me anything! but sofar so good.....they also check all hoses AOS but all seems ok.............f* weird !