Gearbox fault light after going through car wash

SOURCE: gearbox fault light and cruise not available

The only thing that will cause a cruise control fault is a loose vacuum hose ussually on the breather hose coming from the valve cover in front to the throttle body. As for the remainder, shut off the car and restart to get you home and avoid the limp home mode. That in itself is an electronic fault in the ground system. Check you coils or replace them with a new set of plugs (autolite double platinum recommendes.) Clean any grounds you may have and then start you engine. You will notice there is no problem then. Run a diagnostic tool to see if there is any fault with grounded sensors like the O2 to keep that from happening again. Don't get the tranny replaced cause thats all the dealership wants to do and charge you $5k. Its not the actual cause. Good luck and let us know if there is anything else we can do here at fixya.

SOURCE: just power washed my engine.

We stopped washing engines around
1995,guess you missed that

Have to check all electrical connectors
for water intrusion

SOURCE: gearbox fault

Check your transmission fluid level - a 'how to' is in the owner's manual.
GL,
Td