Stalling persists even after dealer

A6 All/ S6 All
#1

Hey guys, I sent my car to the dealer for that stalling issue, and I just got it back yesterday for it to fault almost like it did on the drive home.

Credits to the techs tho, car drove wayyy better as they fixed many smaller unrelated issues, and the car didnt stall this time, only threw the epc/esp fault and ran roughly, and this all happened again in stop n go traffic, but like 15 minutes into the car being at temp instead of like 5 minutes like it used to.

So I guess they managed to somewhat resolve the issue, just not completely? They found a fuel leak and repaired it that they thought was the cause of the problem, repaired a couple vacuum leaks, broken connectors, but it doesnt seem enough.

Issue doesnt seem electrical in the end, but what else could it be?

#2

ESP faults are generally going to be MAF or electronic related issues. You lost or are loosing a signal somewhere.

What stored error codes did it give?

#3

The problem is that it gives every single code you can think of.

But I just logged all o2 sensor values and adaptation values, and except for one that seems to be aging, what Ive seen is that at the moment of the stall, adaptation values go up like crazy 20-25% then suddenly drop to 0% then it stalls. Ive done a couple of researches and that points to a bad crankshaft position sensor, which does concord with the sudden stalls and

And does anybody have the precise location of the sensor? I cant find it online or on charm.li

#4

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#5

yeah I saw that but it didnt really help when its so zoomed in and no general description of where it is. I asked AI and it gave me much better help. It ended up being right under the engine and I can see it if I crouch and look under. Seeing the 4.2L location mislead me to think it was accessible from above.

#6

Your going go to have to jack the car up and potentially remove the bottom covers but its like the transmission cooler box under the transmission. Let me see if I might have a picture

1 Like
#7

Would the crankshaft sensor effect fuel values?

Try to unplug both maf units and see if that helps keep the car running longer