Ford
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    Secondary AIR Switching Valve 'B' Circuit Shorted Conditions
Cause:
    Engine running, AIR circuit commanded on, then the PCM detected a shorted condition in the Secondary AIR circuit (control voltage too low)

Generic
Type:
    Powertrain - Auxiliary Emission Controls - ISO/SAE Controlled
Description:
    Secondary Air Injection System Switching Valve "B" Circuit Shorted