Fuel Level Sending Unit Volts Too Low

Name of Code:
Fuel Level Sending Unit Volts Too Low

When Monitored:
Ignition on.

Set Condition:
The fuel level sensor signal circuit voltage at the PCM goes below 0.10 volts.

Theory of Operation:
The voltage at the fuel level sending unit sends a variable voltage to the powertrain control module to indicate fuel level. The purpose of this feature is to prevent false setting of misfire and fuel system monitor codes when the vehicle is operating at low fuel levels.

Possible Causes:
- Sensor signal circuit shorted to ground
- Fuel level sending unit failure
- Loss of fuel ignition switch output voltage
- Instrument cluster printed circuit board failure
- Powertrain control module failure
- Connector wires
- Connector terminals