gtreng1

Thanks guys.

Always overcharged - What do you mean by blocked flow, i.e. debris in my intake?

Could Lean DTC be a result of fuel pump going? The Lean DTC occurs when I start the car almost immediatel after putting the key in. Do you think this could be a fuel pump issue, not giving the fuel pump enough time to get gas to the injectors, thus resulting in lean combustion and throwing a code? I cleared the code last week and it didn't come back until this morning when I pumped gas and imediately started the car when I got back in.

At what point does everyone change their fuel pump? I did change my Fuel Filter at 75k miles or so. I believe the pump is original.<ul><li><a href="https://forums.audiworld.com/a8/msgs/145348.phtml">https://forums.audiworld.com/a8/msgs/145348.phtml</a</li></ul>

gtreng1

...these guys destroyed my CV joint and they dont want to pay for it, so they make up a story about my axle hoping they can recover their loss.

PaulW

Most likely you have an air leak down stream of the MAF....post the code.

If it's a long term lean code, then it could be the intake manifold gasket leaking or (I think?) injector o-rings possibly leaking.

Marco had this problem and fixed it.....can't remember his user name exactly.....he hasn't been around for a LONG time....I would search for your code on the D2 forum. If you get any hits with Marco's post, search using his ID.

gtreng1

Address 01: Engine Labels: None
Part No: 4D0 907 557 M
Component: 4.2L V8/4V MOTR AT D02
Coding: 01273
Shop #: WSC 02324

3 Faults Found:
17688 - Air Control Valve (N212): Flow too Low
P1280 - 35-10 - - - Intermittent
17544 - Fuel Trim: Bank 1 (Add): System too Lean
P1136 - 35-00 - -
17546 - Fuel Trim: Bank 2 (Add): System too Lean
P1138 - 35-00 - -
Readiness: N/A

Address 08: Auto HVAC Labels: None
Part No: 4D0 820 043 K
Component: D2-KLIMAVOLLAUTOMAT D05
Coding: 00180
Shop #: WSC 02324

4 Faults Found:
00779 - Outside Air Temp Sensor (G17)
30-10 - Open or Short to Plus - Intermittent
00715 - Rear Footwell Vent Positioning Motor (V112)
41-10 - Blocked or No Voltage - Intermittent
01592 - Air Quality Sensor (G238)
57-00 - Electric Circuit Failure
01273 - Fresh Air Blower (V2)
17-10 - Control Difference - Intermittent
-------------------------------------------------------------------------------
Address 35: Centr. Locks Labels: 8L0-862-257.LBL
Part No: 8L0 862 257 N
Component: CV-Pump D10
Coding: 16140
Shop #: WSC 02324

2 Faults Found:
01369 - Alarm triggered by Hood Switch
35-00 - -
00956 - Key 2
09-00 - Adaptation Limit Surpassed
-------------------------------------------------------------------------------
Address 56: Radio Labels: None
Part No: 4D0 035 186 B
Component: Radio D02
Coding: 00113
Shop #: WSC 02324

1 Fault Found:
00856 - Radio Antenna
36-00 - Open Circuit

gtreng1

I noticed that when I looked at the little (1/8"?)(vacuum?) hoses that are connected in the back of the intake valve, there was a unusual molded fitting (a couple of T's) and at the joint, it looked like there were some small cracks. This part is original and I knew it was a matter of time before having to change it out. Can anyone look up the part number along with the intake valve gasket for me in Bentley? This could be the culprit. Another hint might be that my cruise control is no longer working.

gtreng1

Anyone know the P/N for the vacuum lines and fittings coming off the back of the throttle body?