Chrysler
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    TP Sensor Circuit Low Input Conditions
Cause:
    No PCM or TCM codes set, key on, then the PCM detected a TP sensor input of less than 200 mv for 704 ms, or with engine speed over 1500 rpm, VSS over 20 mph, vacuum below 2" Hg, a TP sensor input less than 0.5v for 704 ms

Ford
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    TP Sensor Low Conditions
Cause:
    Engine running, then the PCM detected a TP sensor signal of less than 0.17v (TP PID under 3.42%)

Generic
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Throttle/Pedal Position Sensor/Switch "A" Circuit Low

GM
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    TP Sensor Circuit Low Input Conditions
Cause:
    Key on or engine running, then the PCM detected a TP sensor input of less than 0.16v, all conditions met for 1 second.

Nissan
Type:
    Powertrain - Fuel and Air Metering - ISO/SAE Controlled
Description:
    Throttle position (TP) sensor - voltage low
Cause:
    Wiring, TP sensor, ECM