The P0772 code in your 2022 Chevrolet Equinox indicates shift solenoid E is stuck in the engaged (on) position within the 9-speed automatic transmission. This condition causes the solenoid's controlled function to remain active when it should release.
Equinox 9T50 Transmission
The 2022 Equinox uses GM's 9T50 9-speed automatic, designed for smooth, efficient operation. Shift solenoid E controls specific hydraulic functions. When stuck on, normal transmission operation is disrupted.
What Causes Solenoid E Stuck On
- Internal solenoid mechanical failure
- Electrical short keeping solenoid engaged
- Valve body contamination
- Debris in solenoid mechanism
- TCM continuously commanding solenoid
- Mechatronic internal fault
Symptoms of P0772
- Harsh or abrupt shifts
- Gear ratio conflicts
- Check engine light on
- Limp mode activation
- Reduced power
- Transmission warning messages
GM 9-Speed Design
The 9T50 shares architecture with other GM transverse 9-speeds. It's designed for front-wheel and all-wheel drive applications, with solenoids integrated into the valve body assembly.