1, 2 and 3 Digit Codes: 149

Scan Tool 149 (MIL 42):

Trouble Code Number
- Scan tool 149
- General scan tool (None listed)
- MIL 42

Fault Message
- Fuel Level Sending Unit Volts Too Low

Background
- The fuel level sensor, which is installed in the fuel tank, informs the PCM of fuel level (amount).
- The PCM does not carry out a specific OBD-II monitor when the fuel amount is small or large.

Range of Check
- Battery voltage: 13 - 15 V
- Engine is running

Set Condition
- The fuel level sensor output voltage is less than 0.1 V.

Probable Cause
- Sensor signal line is grounded.
- Fuel level sensor failed
- Loss of voltage supply