A3 (8PA) gear selector issue

[Jerseycar]

A3 (8PA) with an intermittent, reverse gear selection issue, usually occurs when the engine is warm. Current solution is to put it in park, switch the engine off and restart. Had it checked out by the Audi specialists who advised there were no fault codes.  A bit stuck, can't decide whether it's likely to be a ECU issue or mechanical, gearbox/linkage issue.  Has anyone come across this issue or can give any advice what its likely to be ??

[Steve Q]

Could definitely be an issue with the megatronics. When was the gearbox oil last changed as this can sometimes cause selector issues if it's old oil. 

[sixgood4]

had similar isssue with my a3 1.6 tdi 2016  auto  7 speed , had gear box oil /filter changed   fixed the issue .

[Jerseycar]

Tried the gearbox oil/filter change - no change 

[Jerseycar]

Suspect it's something more 'in depth' but making a decision whether to go down the electronics or mechanical investigation is going to be expensive and might find a solution!  I do think, it's likely that there are more cars out there with the problem, just finding out solutions worked. 

[cliffcoggin]

3 hours ago, Jerseycar said:

  I do think, it's likely that there are more cars out there with the problem, just finding out solutions worked. 

Even that could be an expensive waste of money. Just because another car has the same symptoms as yours does not mean the cause or its solution is the same as yours. Diagnosis is the key to getting a repair at the lowest cost.

If your current Audi specialist can not find the problem, find another specialist.

[ertdes]

With the gearbox oil, was the mechatronic fluid also changed?

[Jerseycar]

don't know, but thanks will check it out to see if it was