Ford
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Supercharger Overboost Condition Conditions
Cause:
    The PCM sets this code to keep from damaging the engine or transmission during potential harmful conditions (brake torque, ECT or TOT signal too high)

Generic
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Turbocharger/Supercharger "A" Overboost Condition