Gauges Symptom Troubleshooting - The fuel gauge indication fluctuates

NOTE: 

• The fuel sending unit float level changes frequently due to acceleration, deceleration, cornering, and slopes. As a result, the fuel gauge reading that is displayed is based on inputs it receives from the fuel sending unit, as well as inputs on fuel injector duration.
• The following conditions may cause fuel gauge fluctuations:
• • -

    Driving uphill and downhill for long periods of time.

  • -

    Stopping in a slanted position, such as on a grade.

1. DTC check

   -1. Turn the vehicle to the ON mode.

   -2. Check the low fuel indicator.

   Does the low fuel indicator flash?

   YES 

   Check for DTCs. If any DTCs are indicated, do the indicated DTC's troubleshooting. If no DTCs are indicated, replace the gauge control module .

   NO 

   Go to step 2.

2. Fuel gauge sending unit installation check

   -1. Turn the vehicle to the OFF (LOCK) mode.

   -2. Check for poor connections and loose terminals .

   Are the connections OK?

   YES 

   Go to step 3.

   NO 

   Reconnect the connectors.

3. Fuel gauge sending unit check

   -1. Test the fuel gauge sending unit .

   Is the fuel gauge sending unit OK?

   YES 

   Confirm the operation of the fuel gauge.

   NO 

   Replace the fuel gauge sending unit .