VW TDI V6: Engine Problems & Troubleshooting

Hello.

It's happened to me now too. Last night, the engine simply died while I was driving at about 130 km/h in sixth gear. There was a slight jerk, then it stopped accelerating, and I had to let it coast to a complete stop. The starter motor is working, but the engine won't start.

The gas tank is 1/4 full, the belts are installed. The car has 215,000 kilometers (approximately 134,000 miles) on it. When starting, there is no smoke and no unusual noises.

I now suspect the ESP, it's still the first one. I don't really want to accept it yet. It has always worked without problems so far. There is no tuning installed, everything is original except for a broken EGR valve. }

Could you perhaps give me some ideas about what else it could be before I buy a new ESP guitar?

I can only read the error codes this evening. The glow plug filament is turning on and off when the ignition is turned on...

Thank you very much.

Quote:

... The car has driven 215,000 km... I now suspect the ESP system; it's still the original one

.
Well then, it's overdue .

What does the engine control unit's fault memory indicate?

Check pump status!

Okay, I understand. Please provide the German text you want me to translate into English. I will only provide the translation.

As sad as it sounds, "dieselschrauber" is right. (It's sad not that he's right, but that he's correct about this.)
My brother had the same engine. When I bought the car, my goal was to get a vehicle that is durable and fuel-efficient.

A V6 engine is reliable and, as a diesel, also quite fuel-efficient... (and yes, the engine block was still intact).

"In the first 3 years of owning the car, I replaced the ESP (Electronic Stability Program) module, the injectors (some were clogged), the thermostat (which required removing the timing belt), the camshafts, the valve covers twice, and also the usual parts that tend to fail on an A6, as well as the standard issues common to this type of car."

In summary, he could have gotten an S6 during that time for the same cost... In my opinion, the engine was a real design flaw (it only helped a little that it ran perfectly at the end).

But read it first, just in case it's about something else (like a "Not" signal from the ESP, for example).

Okay, here's the error log:

Initial inspection after the breakdown, involving a lot of tinkering and driving a few meters using the starter motor (to get it off the road).

Wednesday, October 5, 2011, 7:19:45 PM: 17219
VCDS Version: DRV 10.6.4

Address 01: Engine Control Module
Label file: DRV\059-907-401-AKE.lbl
Control unit part number: 8D0 907 401 L.
Component and/or version: 2.5l/4VTEDC G000SG D65.
Encoding: 02002
Company number: WSC 06325
VCID: 2D5B91F2CD81
3 error codes found:

17978 - Engine control unit locked.
P1570 - 35-10 - - - Intermittent.
01318 - Control unit for fuel injection pump (J399)
49-00 - No communication.
01268 - Quantity adjuster (N146)
37-10 - defective - intermittent.

Readiness: Not Available.

MWB 18 showed only zeros.


After clearing these codes, only this one reappeared, but the engine still wouldn't start.

01268 - Quantity adjuster (N146)
37-10 - defective - intermittent.

MWB then displayed 000000010.

mserge wrote:

01268 - Quantity adjuster (N146) 37-10 - defective - intermittent. MWB then showed 000000010

. Then, please check the external cable on the back of the pump to the valve.

TDI-GTI-4-Motion wrote:

mserge wrote: 01268 - Quantity adjuster (N146). 37-10 - defective - intermittent. MWB then showed 000000010 . Then, please check the external cable on the back of the pump, leading to the valve.

They look great, like new. I did some more testing and troubleshooting, and now the "sporadic" error message is gone, and it only shows "faulty" now.

I am now trying to repair the control unit using the instructions. At Audi, the pump costs €2000 here, while at Bosch it costs almost €1600 for a replacement .

I've now ordered a replacement pump; the repair seems too complicated for me, considering that the part has already been used for 215,000 km.

Pump replaced, engine running again.

See you then.