we voted down emmission yet we still do them FML

[Aok303]

po172 bank 1 rich
po175 bank 2 rich

VAG CODE 17535 - P1127, 17537 - p1129 Both are system too rich

it does not say anything else
in the last year i did maf, purge valve, pcv, new bank 2 p2 and gas cap.
I have a b7 s4 JHM 91 tune, piggy pipes aem carbonio intake box(yes i know its not as good as stock but looks better mmm carbon fiber)
unsure where to start as i havent had an audi since 2002 and my b5 s4 got lemoned (7turbo blow outs)

maybe clean MAF, i figured if it was an o2 id get more then one code per o2 as my b2p2 sensor set off 10 codes

Cleaned MAF cleared and same codes came back...


17535 - Fuel Trim; Bank 1 (Mult)
P1127 - 002 - System too Rich - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 194089 km
Time Indication: 0

Freeze Frame:
RPM: 3345 /min
Load: 13.7 %
Speed: 107.0 km/h
Temperature: 96.0°C
Temperature: 45.0°C
Absolute Pres.: 820.0 mbar
Voltage: 13.462 V

17537 - Fuel Trim; Bank 2 (Mult)
P1129 - 002 - System too Rich - MIL ON
Freeze Frame:
Fault Status: 11100010
Fault Priority: 0
Fault Frequency: 1
Reset counter: 255
Mileage: 194090 km
Time Indication: 0

Freeze Frame:
RPM: 3198 /min
Load: 27.8 %
Speed: 102.0 km/h
Temperature: 96.0°C
Temperature: 45.0°C
Absolute Pres.: 820.0 mbar
Voltage: 13.335 V

[bluefox280]

Data logged a sanity check on your MAF?
Checked your fuel trim measurement blocks to see if it's at idle or under throttle?

- erik

[Aok303]

i pulled the codes while at someones house i dont own a Vag
im sure thats what i would need to check those right

could a broken Check Valve cause this mine will come apart but i can snap it back together unsure if its made to or not

https://jhmotorsports.com/shop/catal...-s4-p-396.html
here is the part i am unsure of

[bluefox280]

* VW / Audi DTC 17535 (P1127) - Long Term Fuel Trim mult., Bank1 System too Rich
* VW / Audi DTC 17537 (P1129) - Long Term Fuel Trim mult., Bank2 System too Rich

As told by the fault codes, your Multiplicative fuel trim (fuel adjustment during all RPMs outside of idle) is too rich.
This can be caused by a faulty pre-catalyst oxygen sensor, a faulty MAF, or an exhaust leak prior to the pre-cat O2 sensor.
Doing a VAG-COM data log run of measuring blocks 002 (MAF), 015 & 016 (misfire counts), 032 (fuel trim, banks 1 & 2) will tell you a lot and could pinpoint what the failure is.

- Erik

[Aok303]

I dont own Vag-com was using someones and currently dont have it. to be honest i am also unsure how to do a data log run of these items im a Vagcom noob

[bluefox280]

If you head north to Broomfield, I can assist.
Otherwise grab hold of a local member on your area with a VAG-COM to run such logs.

- Erik

[Aok303]

i can come up there today other wise i normally have monday n sundays off that would be a great help

[bluefox280]

Let's plan on this Sunday, July 3rd for it - say middle to late afternoon.
I'll be in touch via PM later in the week for details.

- Erik

[Aok303]

sounds good ill wait for the PM

[bluefox280]

sounds good ill wait for the PM

PM sent - I'll see you tomorrow on Sunday, July 3rd.

- Erik