Felicia

Did you or anyone recently try to recharge your ac unit with the do it yourself over the counter canister. Higher end vehicles like lexus, Mercedes, bmw, Cadillac etc. Will act by which you have described if the Freon is not done professionally by a shop or machine. The same pressure must remain in the system. So when old is sucked out it has to immediately be replaced and followed by the new. If not it will scramble the main brain and cause everything from the gauges to tranny to go bazzonkers.