I already checked the DIYs and I don't see anything for this.
I also checked this previous forum post:
I am having the EXACT same issues. It is getting progressively worse.
What I noticed: When I allow the vehicle to warm all the way up 190 temp. I NEVER have any issues with it. I only got the PO722 code once.
Who I called: I spoke to a repair shop I trust and I do trust my dealer to an extent... Both said to check the 'wiring harness on the outside of the transmission' Does anyone know where this is? I had a coolant leak that might have corroded some of the connectors and they might just need to be cleaned, per the repair shop and the dealer.
ALSO: If you paid for this repair ( sensor replacement IN transmission ) what did you pay for it and who did you take it to?