I received this error Code the very first extreme cold days of winter 2022 in Manitoba, Canada. Issue was a frozen Turbocharger. Only resolve GM has at the moment is to thaw it out. Only prevention is to basically keep the vehicle parked in an enclosed building when not in use. Preferably heated. Tough situation for most equinox owners north of the Midwest. We can only hope that GM engineers come up with some viable solution over the next 3 years.

 

1. Heated blanket or similar.

2. Hot head hair blower.

No one is gonna change a thing on that CHEAP turbocharger. Semi-Truck Turbochargers have no such issues. They work; they last along time and they don't freeze-up.

 

I get this error code when it's extremely hot out and about 5 minutes after turning on the AC. I bought my 2019 Equinox Premier Sept 2023 at a dealership 3 hrs from when I live. It was hot out and when we got home that night the car was smoking and leaking oil everywhere. Took it to a dealership here and found the vacuum pump seal was blown. Dealership I bought it from paid to have it fixed but since then when I turn on the AC that code comes up and get underboost off engine only. I hook up my code reader and that's only code so I turn off AC and clear code then car runs fine. So is there something blocking the vacuum pump to the intercooler or is the turbocharger freezing causing intercooler to freeze.