Where is ambient temp sensor G249?
 

Vagcom code18330 P1922 Ambient temperature sensor 2 (G249) Open or short to plus

The sensor behind the bumper is ok. Tested with ice water bath and interior display responded as I would expect. Also, the interior A/C operates normally so interior temperature sensor is good.

Couldn't find anything about a second ambient temp sensor with Google.

Could this be the sensor in the fresh air plenum?