Audi Tiptronic Fault now in Limp - Need help please!!

[Paul1982]

Hi Guys,

Ive just bought an A6 4.2 V8 2000 Model which is the 305bhp Tiptronic version. I got it for a seal but it has a clear gearbox fault.

When you start the engine all lights on the dash are fine. Move it into drive and accelorate and the torque converter make one hell of a clunk and its switches into limp mode. The car has no power from 0-15mph after that it drives perfect but no tiptronic mode or kick down available. I was still able to do big speeds. So it seems to change gears fine while going.

I plugged it in and got 2 codes:
1 = 17117 Gear 2 malfunction
2 = 17114 Gear / Ratio Malfunction

Firstly - could low oil or filters create this problem??

The car is on 165k atm you see.

I have been made aware it might be the TCM (Transmission control module) - if so what causes this??

Any help would be greatful!!

Paul

[adyady1066]

First port of call will be the fluid. If it 'clunks' into gear it's either a knackered box or just low on oil. It's recommended for change every 60k so I'd start there. The limp mode could be from a dodgy sensor in the box or just saying it's low so restricting the power. If it's the same 4.2 V8 as the A6 then you could have a leak at the atf intercooler behind the lower front bumper which is a ridiculous price if beyond repair and a nightmare to get to. Fingers crossed for you that it's just low on oil. Go to a knowledgeable VAG specialist and not Audi unless you have a small fortune burning a hole in your pocket.

Good luck!