Ford
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    MAF Sensor Circuit High Conditions
Cause:
    DTC P0505 not set Engine running, then the PCM detected a MAF sensor signal of more than 4 60v Check for a restricted inlet screen on the MAF sensor

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

GM
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    MAF Sensor Circuit High Frequency Conditions
Cause:
    Engine running, system voltage over 8v, then PCM detected the MAF input was more than 300 g/sec, condition met for 1 second.

Nissan
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Mass air flow (MAF) sensor - voltage high
Cause:
    Wiring, MAF sensor, ECM