chosos

I dont know what else to do. I cant afford the audi dealer, and i know its something minor that is just giving me problems - But i cant figure out what it is...

I have a new DP, Magnaflow Cat, a reman. MAF, and a MBC (I think my n75 died hence the MBC - boosts to 14psi cold and 12 psi when its warmed up (is that variation normal??)

6 Faults Found:

16804 - Catalyst System: Bank 1: Efficiency Below Threshold
P0420 - 35-00 - -

17963 - P1555 - 35-10 - Please Register/Activate - Intermittent

16487 - P0103 - 35-10 - Please Register/Activate - Intermittent

17978 - Engine Start Blocked by Immobilizer
P1570 - 35-10 - - - Intermittent

17705 - P1297 - 35-10 - Please Register/Activate - Intermittent

17545 - P1137 - 35-10 - Please Register/Activate - Intermittent

kodeTT

and which DP did you put on? 42DD? check on their website for info on where to buy the O2 sensor adapter.

roadyTT

Many posts regarding your codes

chosos

Its a 2.5" blacktrax custom DP for the 180TTQ. Its 1 of 3.

The cat is a magnaflow and a shop did all the work - I did not do it. I gave them the DP and the O2 elbow, and they did not use the 02 elbow telling me it was not needed - they said it was for a straight pipe only, and legally - they could not install a straight "test" pipe.

I have already searched the forums. The posts detail anything from a vac leak to a bad maf, to bad coil packs to fouled plugs.

I am trying to figure out if the specific range of fault codes I posted indicate one thing more than any other.

If it needs to go back to the shop, i need help trying to figure out if I should be liable to pay for the elbow install since it should have gone on the first time. Any shop mechs, or owners care to chime in?

roadyTT

<ul><li><a href="https://forums.audiworld.com/tt/msgs/1674844.phtml">https://forums.audiworld.com/tt/msgs/1674844.phtml</a></li></ul>

aTTicism

And how would we help determine liability? Gimme a break...

aviattor.3

let's keep that sort of attitude out of this forum, all it does is make people reluctant or cautious to post.

carsluTT

and a few mod's. did u unplug any of the major elec parts of the car and nto plug them back in when u tryed to start the car? di du get a diffrent ecu or chip your car?....... the rest arnt that big a deal to fix.

"16804 - Catalyst System: Bank 1: Efficiency Below Threshold
P0420 - 35-00 - -"

is this bank 1 sensor 1 or sensor 2? if its sensor 2. dont freat...... if its 1 u have some real issue.

chosos

Before I had it done I had a thread going and was told it was only required for a straight pipe.

The shop also told me the o2 bung and elbow were not needed, as the magnaflow had the o2 bung already there. If need be, I can have them unscrew it and put on the elbow - providing it doesnt kill my ground clearance - but do I really need it?

Carslutt &gt;
I am not sure which bank it is. I posted the codes vagcom gave me. As far as I know the only thing not plugged in is the n75 - and its plugged in electronically, but not in the air system. My ECU is --stock--. I only have a Forge DV, MBC, and boost gauge for mods.

I have a pressure tester and cant find a leak. It leaks slowly, but I thought pressure was supposed to slowly leak from the oil cap anyhow?? I tried starting fluid to see if my idle changes. didnt.

I pulled these codes on Sept 11.
16955 - Brake Switch (F): Implausible Signal
P0571 - 35-10 - - - Intermittent

17963 - Shareware Version. To Decode all DTCs
P1555 - 35-10 - Please Register/Activate - Intermittent

17705 - Shareware Version. To Decode all DTCs
P1297 - 35-00 - Please Register/Activate

17545 - Fuel Trim: Bank 1 (Add): System too Rich
P1137 - 35-00 - -


As a final question - would a bad clutch switch at the pedal cause a 17978 - Engine Start Blocked by Immobilizer - P1570 - 35-10 - - - Intermittent ?????

kodeTT

...so it might be what you need to get the O2 sensor out of the flow.