P1117, P1121, Po131, Po151, Po137, Po157

[root_werks]

Yuck:

"A contact at BOSCH who make the sensors for Porsche admitted to me that there are differences (even though the part numbers are the same!) between the ones sold in the aftermarket in BOSCH boxes and the ones sold to Porsche in Porsche boxes or bags. A genuine sensor from Porsche costs between £300 and £500 depending on the engine model, and the Bosch ones are much cheaper. However, the Bosch items tend not to last as long, are made/calibrated to lower spec's and fail much sooner than the Genuine parts. Its even been said that the ones sold in Bosch boxes are often ones which have failed Porsche quality assurance testing. Also a Genuine item comes with a 2 year garauntee from Porsche, even if installed by an independent specialist."

I am starting to think this is my issue. Mine is over 30k miles old. I'll have to check the reciept.

[root_werks]

After lots and lots of reading (I should be working) I've ordered a Bosch MAF, not the dealer one for $707, but one from parts store for $162. The dealer price of $707 is a little hard to swallow.

Seems my issues combined are pointing towards a failed or failing MAF. The ABS light along with the CEL codes certainly support this theory. I'll keep updates coming here.

Although the rodent or water theories carry a lot of merit. I'll start checking those as well.

Dan

[yimmy149]

Hey root,

Since you are in Seattle, next time you need OEM parts, talk to: http://www.****************************************************.com/

Pretty much everything I've ordered from them is half the price of Barrier. Last I checked Barrier charged 30% over the "list" price, and Sunset is way under list. Plus since they are in Oregon it only takes a day or two for stuff to show up UPS ground.

-james

[root_werks]

Thanks! It's been years since I've had a WorldPac account so this helps a lot.

[root_werks]

I am using OBD-2 software which only has VW-Audi level codes beyond standard OBD2 codes.

Hooked it up, yup, all codes present, cleared them and ran a test on the O2's, they all passed.

I'll update when I get my MAF, re-clear codes and drive, log data.

Anyone have any other OBD2 software they could recomend?

[root_werks]

New MAF installed today, cleared codes, 5 minutes into the drive they all came back.

Going to start looking deeper into the harnes.