Case IH 11011 – INST (Instrumentation) Controller: Fuel Level Sensor voltage is too low (open circuit, short to ground)

The system logs this specific code when the fuel level sensor signal voltage falls out of range low—specifically, when the signal drops below 0.125 volts for 1 second.

• STX Steiger
• MX Magnum Series tractors
• TG Series tractors (e.g., TG210, TG230, TG255, TG285)
• Steiger Series tractors
• Puma Series tractors
• Axial-Flow Combines (e.g., 5130, 6130)

1. 1

   Verify the fuel level sensor signal voltage to confirm it is reading below the 0.125-volt threshold.

2. 2

   Check the resistance of the fuel level sensor to determine if the sensor itself has failed internally.

3. 3

   Inspect the wiring harness running from the instrumentation controller to the fuel level sensor for any signs of an open circuit or a short to ground.

1. 1

   Access sensor

   Access the fuel level sensor, which is located on the fuel tank.

2. 2

   Test sensor resistance

   Disconnect the sensor and use a multimeter to test its resistance. If the resistance is out of specification, the sensor has failed and must be replaced.

3. 3

   Inspect and repair wiring

   If the sensor tests good, trace the wiring harness from the sensor back to the INST (Instrumentation) controller. Look for chafed wires, disconnected pins, or shorts to the chassis ground. Repair or replace the damaged wiring harness sections.

4. 4

   Replace or reprogram controller

   If both the sensor and the wiring harness are functioning correctly, the failure is likely within the instrument controller itself, which will need to be replaced or reprogrammed.