vorTTax

I bought a vag-com and this is in the fault code

VAG-COM Version: Release 404.0-S
1 Fault Found:
17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -
or sometime its says system too lean.
The car has 29,000 miles and the engine light was coming on every other day. Now its every day.
It happens if I'm driving or stopped a a light.
Can someone tell what the problem could be or what to check?
thanks
Jim

TTschwing

Good chance it's a MAF...

FasTTr

MAF most likely or O2 Sensor

vorTTax

By the way I installed the TTDA and it works great. This problem was happening with stock airbox. Th car runs great, because I feld the differents atfer the install. Oh another thing I just thought of, is the car is a little jerky when cold.

TTschwing

It will often bring a marginal one back to life..

FasTTr

Audi extended the MAF warranty to 70K miles.

vorTTax

I'll try it and thanks

fredfromny

Check M Block 032 to see if the second value (multiplicative trim) O2 readings vary by more than +/- 10%. This would point to the MAF sensor as the culprit.

vorTTax

Okay thanks

kodeTT

and made sure it was dry as a bone before putting back in. That did the job and haven't thrown a DTC or CEL at all.