Ford
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Flexible Fuel Sensor Circuit Conditions
Cause:
    Engine running, then the PCM detected an out-of-range signal from the flexible fuel sensor (40-160 Hz) To identify the fuel (on the door jam), a prefix of 610C indicates an ethanol vehicle and a prefix of 610G indicates a methanol vehicle

Generic
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Fuel Composition Sensor Circuit