I do not love my car. The NIGHT I want to buy expensive parts is the night codes are thrown.

P0411, duh SAI incorrect flow, I figured I most likely wrecked the pump since its been raining down here all day/night and I don't have a belly pan.

P0102?? Never seen before. Google tells me its Mass Air Flow Circuit Low Input. Ghey to the max. Fried MAF? Im assuming the 2 codes are slightly related because the fact the sai measures flow through the MAF.

Ideas?

 

are you still running the stock airbox? I feel like these codes have got to be related, your MAF and SAI pump don't just crap out at the same time. Boost gauge? vac leaks?

 

The P0411 is one you shouldn't even worry about. It could be caused by a bad SAI relay, pump, or lines to and/or from the SAI. It's really not anything to worry about as it just helps with emissions on cold starts.

For the other code, since you are an 01, just unplug your MAF and run without it for awhile. But CCA4 is right, check for leaks and try cleaning your MAF too.

 

The problems are that I have emissions to pass in Jan I did clear it and they both showed up, which is why I posted here. I have run maffless before, and it does something nasty to the TCM when you do that. when you go into D it just SLAMS into gear, and it also bangs into 5th really harshly, loud enough to jerk the whole car, its frankly scary (some kind of limp mode?) With the MAF plugged in its perfectly fine.

Car runs fine however.
Boost gauge reads:
P- 20in
D-17in
WOT - Spike 11 hold 9
Decel - 22in

 

hmm, thats about what mine reads. Can you hear the SAI pump running on cold starts?

 

Its nice and quiet, but yep if I get down by that area I can hear it running.

Once I get home, Ill start taking it all apart to see what I find

 

So I'm all like because I get home and pop off the maf boot. I see a mist and smell lots of gas. The injectors are like 573feet away from the maf, so idk. Still taking things out

 

Success! After literally fighting 4 single use clamps for about 2 hours, I got the intake boot off, and under it, found my plastic hose that goes from the SAI to the hard pipe, then combi valve had simply broken off, so I had a nice vac leak.

 

strange that you were still showing ~20inhg at idle though

 

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recently bought a 2004 audi a6 2.7t quatro 94k its been driving good dont really use it much have a work van that i drive. Its my first really nice car. I just did its first oil change and the check engine light came on the day before the mechanic pulled the code and it said p0741 Torque Converter Clutch Circuit Performance/Stuck Off i have no idea what that means i need some help asap i want to really take care of this car. Any advice is much appreciated thank you.