Ford
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Barometric Sensor Intermittent Conditions
Cause:
    Engine running and the PCM detected an intermittent BARO sensor signal was received

Generic
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent