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Hi All,

I have a C5 RS6 2003

Have had this issue for a few weeks now i will explain the best I can because it really is a strange one...

If i start the car with one motion of the key all is well...

If i turn the key to position 2 (All lights on, engine off) then start the car... the gearbox will go into limp mode (all PRNDS lit up)

if i switch the car off and back on all is well.



Have changed the oil and filter.. initially it was 2 liters down but have corrected this now.
Also have changed the battery for an original Audi one.
Checked all plugs to and from gearbox
Checked all wiring to all solenoids and the wiring loom.

fault code comes up with 18243 Control valve 5 (N223) short to plus.

Thanks

wrong forum mate you need the c5 section!

sorry I will repost