i just pulled the DTCs from my car after an alignment and brake job to make sure everything seems fine. here are my results. the ABS and the Engine codes are what is troubling me the most. the O2 sensors are brand new, as well as the spark plugs and coil packs. the spark plugs were also gapped appropriately too. 0.8 if i remember, but i might have to double check. as for the steering angle sensor, it wasn't broken last night when i pulled codes, only today after an alignment so i'm curious as to how that could happen. the other DTC under abs makes no sense to me, sensor 1/2 of brake pressure? if anyone could shed light on this stuff i'd be very thankful.

VAG-COM Version: Release 704.1
Data version: 20070629

Wednesday,11,July,2007,19:37:14:05199

Chassis Type: 8N - Audi TT
Scan: 01 02 03 08 15 17 22 35 37 45 55 56 76 77

VIN: TRUWT28N121011153
-------------------------------------------------------------------------------
Address 01: Engine Labels: 8N0-906-018.LBL
Part No: 8N0 906 018 AN
Component: 1.8L R4/5VT G 0004
Coding: 06710
Shop #: WSC 78645
TRUWT28N121011153 AUZ5Z0A8140091

5 Faults Found:
16804 - Catalyst System; Bank 1: Efficiency Below Threshold
P0420 - 35-10 - - - Intermittent
16684 - Random/Multiple Cylinder Misfire Detected
P0300 - 35-10 - - - Intermittent
16685 - Cylinder 1: Misfire Detected
P0301 - 35-10 - - - Intermittent
16688 - Cylinder 4: Misfire Detected
P0304 - 35-10 - - - Intermittent
16686 - Cylinder 2: Misfire Detected
P0302 - 35-10 - - - Intermittent
Readiness: 0010 0000

-------------------------------------------------------------------------------
Address 03: ABS Brakes Labels: 8N0-907-379.LBL
Part No: 8N0 907 379 E
Component: ESP 20 CAN V005
Coding: 18446
Shop #: WSC 01236

2 Faults Found:
00778 - Steering Angle Sensor (G85)
04-00 - Mechanical Malfunction
00810 - Sensor 1/2 for Brake Pressure
27-10 - Implausible Signal - Intermittent

-------------------------------------------------------------------------------
Address 08: Auto HVAC Labels: None
Part No: 8N0 820 043 A
Component: TT-KLIMAVOLLAUTOMAT D03
Coding: 00140
Shop #: WSC 01236

No fault code found.

-------------------------------------------------------------------------------
Address 15: Airbags Labels: None
Part No: 8N0 959 655 A
Component: Airbag Front+Seite 5000
Coding: 01103
Shop #: WSC 01236

No fault code found.

-------------------------------------------------------------------------------
Address 17: Instruments Labels: 8Nx-920-xxx-17.LBL
Part No: 8N1 920 980
Component: KOMBI+WEGFAHRS. M73 D14
Coding: 07244
Shop #: WSC 01405
TRUWT28N121011153 AUZ5Z0A8140091

No Faults Found
or DTCs not supported by controller
or a communication error occurred

-------------------------------------------------------------------------------
Address 22: AWD Labels: 02D-900-554.LBL
Part No: 02D 900 554 C
Component: HALDEX LSC ECC 0009

No fault code found.

-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: None
Part No: 8N8 962 267 A
Component: Central Lock/Alarm D06
Coding: 15976
Shop #: WSC 06435

No fault code found.

-------------------------------------------------------------------------------
Address 45: Inter. Monitor Labels: None
Part No: 8N8 951 177
Component: Innenraumueberw. D09
Coding: 00001
Shop #: WSC 00000

No fault code found.

-------------------------------------------------------------------------------
Address 55: Xenon Range Labels: 4B0-907-357-AUT.LBL
Part No: 4B0 907 357
Component: LEUCHTWEITEREGLER D004
Coding: 00010
Shop #: WSC 01236

No fault code found.

-------------------------------------------------------------------------------
Address 56: Radio Labels: None
Part No: 4B0 035 186 H
Component: concert II NP2 0007
Coding: 00201
Shop #: WSC 00003

1 Fault Found:
00858 - Connection; Radio ZF Output to Antenna Amplifier
36-00 - Open Circuit

End --------------------------------------------------------------------------------------------------

 

they should be gapped at .28...not sure if that was a typo or not....so check that....

What type of plugs did you use?

On the ABS sensor error...not sure, you may want to clear it and see if returns. Could be just an electrical gremlin....

 

do a full throttle run in 2nd or 3rd gear and watch block 002, the 4th value I think. It measures air mass in g/sec and should peak about .8 x HP(180 or 225 depending on what you drive). If it's significantly lower than that, the MAF is prob'ly sending bad data to the ECU which is therefore sending goofy fuel demands to the injectors, therefore intermittent misfires.

 

Still had same damn codes. Then replaced catalytic convertor with a Magnaflow. Codes all cleared and stayed clear.
Good luck.

 

thanks. i definatly will give that a try!

 

thanks, you've given me some things to think about.

 

- the coils or plugs are no good. new or not.

- the 16804 cat code is pretty typical with hi-flow cats. means the o2 sensors aren't warming up as fast as your exhaust is. no big deal. is your ecu reprogrammed? if so - see if the company has an update for the cat code. i got one from apr.

- your G85 part (steering angle sensor) might be shot. did you pull the steering wheel lately?

 

i pulled the steering wheel, but i haven't zero'd it out yet. i'm assuming thats why i got code