2025-2026 Jeep Compass Low Fuel Light On After Filling Tank

Owners of 2025-2026 Jeep Compass vehicles may encounter an issue where the "Low Fuel Light On" illuminates or the fuel gauge "Reads Empty After Filling Tank". This occurs even when the fuel tank has been recently filled. The Powertrain Control Module (PCM) incorrectly displays a reading indicating low fuel, leading to an inaccurate fuel level display.

Symptoms

The primary symptom is the fuel gauge showing an incorrect low fuel level or remaining on empty, despite the tank being full. The "Low Fuel Light On" may also illuminate persistently. This condition typically occurs without any Diagnostic Trouble Codes (DTCs) being set in the vehicle's system.

Diagnosis

Technicians will use a scan tool to observe the fuel level data reported by the Powertrain Control Module (PCM). If the PCM voltage reading indicates a low fuel condition after the vehicle has been filled, and no Diagnostic Trouble Codes (DTCs) are present, this manufacturer communication (S2508000040 REV.A) applies.

The fuel level sensor provides resistance and voltage signals to the PCM. For reference, a full tank typically corresponds to 60-75 Ohms and 0.75-1.0 Volts, while an empty tank is around 725-770 Ohms and 3.4-4 Volts.

Repair Procedure Summary

To address the inaccurate fuel level reading, the following steps are recommended:

1. Body Control Module (BCM) Reset: Perform a reset of the BCM using the "wiTECH – Guided Diagnostics" system.
2. Verify Fuel Level Data: After the BCM reset, observe the fuel level data. If the PCM now reads accurately, no further service is required.
3. Inspect Fuel Pump Module Connector: If the fuel gauge still displays inaccurate readings, inspect connector D6602B at the Fuel Pump Module. Access to this component requires following the service panel removal instructions found in Section 09 - Engine, 2.0L / Fuel System / ASSEMBLY, Fuel Pump / Removal and Installation.
4. Check for Damage and Secure Connection: Unseat the D6602B connector and inspect it for any terminal damage. Repair any damage found. If no damage is present, ensure the connector is securely seated. The document illustrates that an incorrect connection can occur even if the connector appears seated, specifically if the CPA (yellow lock) is not fully engaged.
5. Validate Connection: Use the "Push-Pull-Push method" to confirm a secure connection of the D6602B connector.
6. Final Verification: Start the vehicle and verify that the fuel level gauge now shows the correct amount of fuel.

Important Warnings

This document, S2508000040 REV.A, serves as a record of past experiences and does not authorize warranty repairs. It does not provide conclusions about vehicle malfunctions but captures similar cases. Technicians are advised that they are responsible for determining the appropriate course of action.

What Owners Should Do

If your 2025-2026 Jeep Compass is experiencing the "Low Fuel Light On or Reads Empty After Filling Tank" issue, contact your authorized Jeep dealership. Describe the symptoms clearly. The dealership technician will follow the diagnostic and repair procedures outlined in manufacturer communication S2508000040 REV.A to resolve the problem.

Source: NHTSA ID: S2508000040 REV.A