NHTSA Complaint #11565818 — 2015 AUDI Q5

We have never had an issue with the vehicle until we recently faced very cold Temps (-10 to -20). Was driving the vehicle, with no issues, and stopped to get gas. Upon restarting the vehicle it displayed a power steering error with a do not drive. The steerling lost all power steering function and was extremely hard to turn. We let the vehicle sit and restarted it 3-4 times and on the fourth try, the error went away and there was no further issues with the power steering on this (first) occasion. This has now happened intermittently since the first occurrence (even with very cold Temps) but with no regularity. Not sure if this is a malfunction or if there is something in need of replacement. It is extremely concerning.