Hey, thanks for reading and looking for some hints/tips/help

My A6 will randomly go into limp mode. I can be sitting at a stop light, a coffee stand, etc. as an example, and suddenly the dash gear indicators all come on. Nothing to indicate anything wrong other than it just happened.

I can be driving down the road and 1 of a couple things can happen

1. Feels like a very very hard shift, then limp mode
2. Suddenly in limp mode with no physical shakes/shudders/hard shifting

In any of the situations above, turning the car off and then on again immediately clears it. Sometimes it comes back almost intantly, other times it is cleared for the day, sometimes for 1-30 minutes.

The other thing is, that sometimes I can drive it for days and it never goes into limp mode.

Things I have done already:

• Replaced the TCM under the passenger footwell with the exact same one that was in it
• Transmission fluid, looked good, no shavings or anything like that that I saw
• Replaced MAF Sensor with new one
• Cleaned old MAF Sensor and tried it as well

Not sure where to go from here. I would like to get this thing fixed and sell it. As much as I would like to keep it, that isn't in the cards at the moment.

Any help appreciated.

I would lean towards the transmission range control sensor. Could be a bad connection. Start by looking for tranmission codes if you have a vag com reader. the switch is about 400 to replace and about 3 hours work