Alternative Fuel Tank A Level Sensor Circuit Intermittent/Erratic

Where it lives

For P01B3, the circuit described runs through the sensor. The description of P01B3 reports a fault at the sensor.

Check these first

• A loose alternative fuel tank A level sensor connector
• Chafed wiring on the level sensor circuit
• A failing fuel level sensor in tank A
• A sticky float arm in tank A
• A poor ground on the level sensor circuit

What to do next

1. Watch the alternative fuel level reading on a scan tool
2. Wiggle test the level sensor harness on live data
3. Inspect the level sensor wiring for chafing
4. Check the float arm for binding or a stuck float
5. Replace the alternative fuel tank A level sensor if erratic
6. Clear the code and retest

Look up another code