Chrysler
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Volume Airflow Sensor Circuit Conditions
Cause:
    Engine running over 500 rpm, then the PCM detected the VAF sensor input was 3 Hz or less (it should be 22-48 Hz) Inspect airflow sensor wiring & connectors for any faults

Generic
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Mass or Volume Air Flow "A" Circuit

GM
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    MAF Sensor Insufficient Activity Conditions
Cause:
    No MAF sensor codes set, engine speed over 500 rpm, system voltage over 11v, then the PCM detected that the MAF sensor input varied less than a calculated minimum amount for 1 second