You probably damaged the ECU. Automatic car washes dump more water near the firewall than the drains can handle, and its not uncommon for the ECU to short out becuase of water damage.
Have it checked out ASAP.
<span style='color:gray'><span style='font-family:Courier'>1995 e36 3 Series RIP
1999 e46 3 Series BURN IN HELL
2000 MR-S Roadster= Current</span></span>