Washed engine bay, car now in limp mode w/heavy whine sound and many lights

[AndreX86]

So I was dumb and washed the engine bay . I tried to be cautious but wasn't cautious enough it seems and did apply pressure in places I thought was safe. As soon as I pulled out of the car wash I was hit with limp mode, TPMS/CEL/ABS lights & a loud whine noise that seems to get louder as I apply more throttle and kind of sounds like its related to the turbo but I can't tell.

I have a few codes from the engine:
- P010100 - Mass or Volume Air Flow Sensor "A" Circuit Range/Performance
- P029900 - Turbo/Super Charger Underboost
- U111300 - Function limitation due to received malfunction value

Also:
- P263700 - Torque Management Feedback Signal "A"
- 00384 - Optical data bus - Open circuit.

Should this clear up as it drives or did I break something? I'm driving a 2013 Allroad.

[Theiceman]

im sure something just got wet, not too much to worry about , id check the MAF connection and see if you got water in it. i blast mine all the time with a power washer and never had an issue .. you probably just had water ingress somewhere.

[A4fuzz]

im sure something just got wet, not too much to worry about , id check the MAF connection and see if you got water in it. i blast mine all the time with a power washer and never had an issue .. you probably just had water ingress somewhere.

Agreed, I blast my engine bay all the time. Check some connections and maybe spray with WD40.

[silver_tt]

Agree with others. In the future just apply some Gunk, let is sit for 15 mins, then gently rinse it off with a garden hose. Don't use a pressure washer..........

Keeping your engine bay clean is not stupid at all and is the easy first line of defense in seeing issues like oil leaks.

[AndreX86]

Thanks all. Woke up this morn and the car is behaving the same. Will check MAF and other connections, hopefully this is something that is easily resolved.

[AndreX86]

Thanks all. Woke up this morn and the car is behaving the same. Will check MAF and other connections, hopefully this is something that is easily resolved.

So no luck so far. After resetting codes I noted one down that I didn't record before hand;
- 01314 - Engine control module.

I also power washed under the car and where there

[AndreX86]

After spraying connections with WD40 and leaving it over night things have gotten much worse. Car will die almost immediately while MAF is connected, ESC and TPMS errors are still coming on . There is a very loud whine noise I hear when the car gets to and exceeds 2000 RPM and it is very sluggish which results in a check engine light coming on. At this point I think its time to take her into the deal ship.

EDIT: Dealship has a two week wait. This what happens when you live in a state with 1 audi/vw dealership. So i might take it to a Euro shop i've been to before. Though I'm wondering, can anyone explain this loud whine noise that sounds like a jet is taking off?

[AndreX86]

FIXED

Thanks everyone for pitching in your 2 cents to help me out.

Ok so here's the story. On Sunday I had tried to install a turbo muffler delete a friend had given to me though it didn't have all the parts so I re-installed the stock one. It appears that due to a combination of not tightening the hose that connect to turbo exhaust tight enough + washing the engine bay (maybe due to a difference between hot and cold temps), the hose popped off immediately after leaving the bay. This happened on Tuesday evening and I had just started getting a cold so I didn't have the energy to get under the car. Today I finally had the energy and felt good enough to get under her and lo and behold the pipe was popped off.
After connecting the pipe back to the turbo exhaust and resetting a million different codes, everything is running perfectly. Not a single code came back after connecting the hose.

[Theiceman]

It's amazing the added info you get later...



Sent from my Pixel 6 using Audizine Forum mobile app

[adamazing]

The moment I listened to your video, I knew it was a boost leak. Sounded exactly like how mine did every time I popped an intercooler connection. Like a tiny airplane taxiing to the runway.

[MyDimeIsUp]

The moment I listened to your video, I knew it was a boost leak. Sounded exactly like how mine did every time I popped an intercooler connection. Like a tiny airplane taxiing to the runway.

Thank you for not calling it the "tarmac". God I hate that word. Apron, taxiway, gate, and runway. That's all an airport has. No such thing as the "tarmac"

[AndreX86]

It's amazing the added info you get later...



Sent from my Pixel 6 using Audizine Forum mobile app

Yeah I just thought what I did on Sunday was unrelated because it happened right after I left the car wash and TPMS/ABS lights coming on. It should have been a little more obvious to me with the sound I was hearing but I just scared myself into think I messed up the electrical.