UI_a157 — MCU Active Cooling Requested
Full alert identifier: UI_a157_MCUActiveCoolingRequested
Alert description
MCU requires colder coolant to maintain functionality
Potential impact
Reduced supercharging/HVAC performance and additional noise and vibrations
Set condition
MCU temperature exceeds nominal operating temperature
Clear condition
MCU has cooled down sufficiently and Supercharge drive and charge session completed
Check other alerts
With Service Mode Plus enabled, open Service Alerts → All. Review the other alerts for clues to the cause of UI_a157.