rennen-affe

It has nothing to do with the CEL, which is a separate light above the MFA. However a DTM could trigger the cel to light up, mine never did.

spawne32

Seems to have a lot to do with a CEL if a DTM can trigger the CEL to light up, and you had a soft code in the engine computer which also triggered a DTM. Every code in the engine computer has its own priority of which lights it triggers, and since engine codes can trigger DTM, it very much as to do with a CEL. On other cars without this buzzword on the digital display, it would otherwise just be a MIL being displayed.

rennen-affe

The CEL did not illuminate.

I previously stated that.

spawne32

That does not mean that there is not an engine code related to the DTM. Drivetrain malfunction does not mean, "everything but the engine".

rennen-affe

Which is how I pulled the code, lol.

Again, Drivetrain Malfunction in the MFA came up. No CEL, but was able to pull overboost code that triggered DTM.

LightningTruck

What is the code number?
.

rennen-affe

Don't recall, I'll have to pull VCDS logs off the laptop. Doubt I'm doing that. But it was an overboost in the description.

That's like asking, what was question 3 on your Social Studies test in 10th grade.

lowjdml

You can search these forums for “drive system malfunction”.
I replied to one of those, where my dealer repaired it at “no charge”.
Hope it goes well for you.

dseag2

It could be any number of issues. A couple of months ago, I got the Drivetrain Malfunction light. If I accelerated briskly, the car just didn't have much power and made a loud noise. The first time it happened I thought there was a car with a loud muffler beside me but it was my car. If I accelerated slowly it didn't come on.

I took it to the shop and it was a loose hose that connected to the turbo. They fixed it quickly. No more issues.

recreation

I took into the dealer to get a diagnosis. They had another A4 in with the same warning popping up that turned out to be caused by rodents eating their wiring harness. Mine was the turbo wastegate. $5000 for a new turbo. Ouch.