What is DTC 0875 in Allison 2000 transmission?

Diagnostic Trouble Code (DTC) 0875 in an Allison 2000 transmission indicates a "Fuel Pressure Sensor A Circuit Failure." This code is triggered when the transmission control module (TCM) detects a problem with the fuel pressure sensor A circuit, which is responsible for monitoring the fuel pressure in the transmission.

Potential causes of DTC 0875:

- Faulty fuel pressure sensor

- Damaged wiring or connectors in the fuel pressure sensor circuit

- Faulty transmission control module (TCM)

Symptoms of DTC 0875:

- Transmission may not shift properly

- Reduced fuel efficiency

- Check engine light may be illuminated

To diagnose DTC 0875:

- Inspect the fuel pressure sensor and its connectors for any damage or contamination.

- Check the wiring and connectors in the fuel pressure sensor circuit for any breaks or loose connections.

- If necessary, replace the faulty fuel pressure sensor or repair any damaged wiring or connectors.

- Clear the DTC from the TCM memory using a diagnostic scan tool.

To fix DTC 0875:

- Replace the faulty fuel pressure sensor.

- Repair any damaged wiring or connectors in the fuel pressure sensor circuit.

- Update the TCM software to the latest version, if necessary.

After completing any repairs, it is important to clear the DTC from the TCM memory using a diagnostic scan tool and road test the vehicle to ensure that the problem has been resolved.