Challenger D127 – Instrument Cluster or Engine Control Module (ECM): Fuel Gauge Issue

The system has detected a problem related to the fuel gauge, resulting in an inaccurate, erratic, or non-moving fuel level reading. This is typically caused by a faulty fuel level sender (a variable resistor within the fuel pump module) failing to send the correct resistance value to the instrument cluster or Engine Control Module (ECM).

• 2010 Dodge Challenger
• 2012 Dodge Challenger
• 2020 Dodge Challenger
• Challenger RT
• Challenger SXT

1. 1

   Perform a gauge cluster reset (on older models, press and hold the odometer reset switch, turn ignition to 'ON', and allow the diagnostic cycle to run)

2. 2

   Visually inspect the wiring harness and grounding for the sender connector, ensuring they are free of corrosion

3. 3

   Use a scan tool to read live data from the fuel level sender, graphing the voltage while adding fuel to check for linear tracking

4. 4

   Visually inspect the fuel pump/sender module inside the tank to ensure insulator pads are not interfering with the float's travel and that the float moves freely

1. 1

   Access fuel tank

   Remove the rear seat to access the fuel pump module, or lower the fuel tank depending on the specific model and component location.

2. 2

   Replace fuel level sender

   Replace the faulty fuel level sender. If integrated, replace the entire fuel pump module assembly. Replace both primary and secondary senders if necessary.

3. 3

   Replace gasket

   Install a new fuel pump module gasket whenever the sender or pump is serviced.

4. 4

   Re-calibrate system

   Perform a re-calibration or re-learn procedure so the system recognizes the new component and provides accurate readings.

5. 5

   Road test

   Perform a road test, ideally starting with a full tank of fuel, to confirm that the fuel gauge is reading accurately.