Fault Codes 3.0 tdi

[munchkincoupe]

2005 A8 D3 SWB 3.0 tdi quattro

I was getting an intermittent engine management light coming on over the last 6 months. The quality of the drive has never changed and I had the faults cleared about 4 months ago (listed below). They came back after a few days but the EML can be on or off on different journeys. I could drive for 20mins with the light on, park up for 10mins, restart the car and it would be off and stay off for 3-4 days.

A couple of weeks ago it started to be on constantly - again you can't tell from the drive of the car. Here are the codes:

18395 - can't find list for this?

18277 - P1869 - Transmission Mount Valve 1 (N262) - 001 - Short to Ground

19804 - P3348/013128 - Control Circuit for Controller for Turbocharger 1 (J724): Electrical Malfunction

17985 - Right Engine Mount Solenoid Valve (N145): Open Circuit P1577 - 004 - No Signal/Communication Readiness

17953 - P1545/005445 - Throttle Valve Controller: Malfunction


My car also dropped it's charge earlier this week as the clocks had reset when I came to start the car in the morning.

Can the A8 really have all these problems at once? I don't understand how they can go off and stay off for long periods if a closed circuit is triggering a sensor? Am I missing something else?

Thanks for any help