Audi
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Engine coolant thermostat - short to positive
Cause:
    Wiring short to positive, engine coolant thermostat

Chrysler
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    CNG Pressure Sensor Voltage Too Low Conditions
Cause:
    Key on or engine running, then the PCM detected that the CNG Fuel Pressure sensor input was more than 0.49v. Refer to correct code repair chart in other manuals to test CNG sensor, its related circuits and the PCM.

Volkswagen
Type:
    Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description:
    Engine coolant thermostat - short to positive
Cause:
    Wiring short to positive, engine coolant thermostat