WOMS
C code chassis Medium severity

C1750 Accelerator Position Sensor Out of Range

The OBD2 code C1750 indicates that the accelerator position sensor is providing readings that are outside the expected range, which can affect engine performance and throttle response

Definition

The OBD2 code C1750 indicates that the accelerator position sensor is providing readings that are outside the expected range, which can affect engine performance and throttle response

Common causes

  • Faulty accelerator position sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Throttle body issues
  • Calibration issues
  • Faulty engine control module (ECM)
  • Mechanical binding in the throttle linkage
  • Corrosion or dirt in the sensor or connectors

Common misdiagnoses

  • Throttle Position Sensor (TPS) issues
  • Accelerator Pedal Position Sensor (APPS) failure
  • Wiring or connector problems
  • Engine control module (ECM) faults
  • Transmission control module (TCM) issues
  • Vacuum leaks
  • Fuel delivery problems
  • Ignition system faults
  • Mechanical issues in the throttle body
  • Software or calibration errors in the ECM

Troubleshooting steps

  1. 1. Check for Additional Codes

    Use an OBD-II scanner to check for any other related trouble codes. This can provide more context and help identify if there are other issues present

  2. 2. Inspect the Accelerator Position Sensor

  3. 3. Locate the accelerator position sensor (APS) and visually inspect it for any signs of damage, corrosion, or loose connections

  4. 4. Ensure that the wiring harness and connectors are secure and free from dirt or moisture

  5. 5. Test the Accelerator Position Sensor

  6. 6. Use a multimeter to test the resistance and voltage output of the sensor. Compare the readings to the manufacturer's specifications

  7. 7. If the readings are outside the specified range, the sensor may need to be replaced

  8. 8. Check for Mechanical Issues

  9. 9. Inspect the throttle body and linkage for any obstructions or binding that could affect the accelerator pedal's movement

  10. 10. Ensure that the accelerator pedal is not sticking or has any physical damage

  11. 11. Inspect the Throttle Position Sensor (TPS)

  12. 12. If the vehicle has a separate throttle position sensor, check its operation as it can also affect the accelerator position readings

  13. 13. Test the TPS for proper voltage and resistance

  14. 14. Check for Ground Issues

  15. 15. Ensure that the ground connections for the accelerator position sensor and related components are clean and secure

  16. 16. Look for Software Issues

  17. 17. In some cases, a software update for the vehicle's engine control module (ECM) may be necessary. Check with the manufacturer for any available updates

  18. 18. Clear the Codes and Test Drive

  19. 19. After performing any repairs or adjustments, clear the trouble codes using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  20. 20. Consult a Professional

  21. 21. If the issue persists after performing these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you can identify and resolve the issue related to the C1750 code effectively