So I had the TCM repaired by BBA and it is still in limp mode "prnd" all flashing and will not move. The only code I get is 18221/P1813 pressure solenoid 1 electrical (N215). If it's not the TCM what is the issue and how do I fix it? (also trans fluid is good and changed) I can't find anything regarding a fix or narrowing down the issues. I even switched the solenoids around and get the same error. Does this error mean valve body or wiring. Can anyone help me with this?!?

 

Was it an Audi dealership that replaced it?

 

No it was myself that changed it and I followed everything step by step when re installing a new tcm. I also flushed and changed the fluid and followed those steps

 

We're you able to solve this? I'm having the exact same issue after getting mine back from bba

 

Yes and No. I believe I finally found the issue but I have not finished the repairs to verify. What I found is and if you have a scanner, look at the transmission measuring block 7 and look at field 4. If it says "AS" the engine RPM and transmission RPM are out of synchronization. Mitchell OnDemand and repair guides say "AS" means a new transmission.

Now I wouldn't say I "solved" the issue, but with the processes of elimination spending money and time, I repaired the TCM, looked for electrical issues, drained and refilled trans, even replaced the valve body (which the car would now move a little bit afterward which it didn't before) all to still have that error code and later finding that "AS".

"AS" means the clutches are bad and because Audi doesn't repair these transmissions it automatically gets labeled as needing a new transmission.

It's common for the clutches to go bad as you can research being why they upgraded to 7 vs the 6.

If you play with the fluid levels you might find, even thought you still have the code, the trans produces more/less power. Mine wouldn't move at all so adding more fluid meant more pressure on the clutches which let the car move slightly.

I'm not an expert and I consider myself an amateur so this is what I found and believe is my issue and forgive me if I'm wrong or misinformed. I am currently in the process of changing the clutches and will update with the results

 

Hello did you ever fix this problem i have new clutches installed tranny was rebuilt and now it gives me this error