WOMS
P code powertrain High severity

P0337 Crankshaft Position Sensor A Circuit Low Input

The OBD2 code P0337 indicates that the crankshaft position sensor A is providing a low voltage signal, which may suggest a malfunction in the sensor or its circuit

Definition

The OBD2 code P0337 indicates that the crankshaft position sensor A is providing a low voltage signal, which may suggest a malfunction in the sensor or its circuit

Common causes

  • Faulty crankshaft position sensor
  • Damaged wiring or connectors
  • Poor electrical connections
  • Faulty engine control module (ECM)
  • Timing belt or chain issues
  • Oil contamination on the sensor
  • Incorrect sensor alignment or installation

Common misdiagnoses

  • Faulty crankshaft position sensor
  • Faulty camshaft position sensor
  • Wiring issues or shorts in the sensor circuit
  • Faulty engine control module (ECM)
  • Timing belt or chain issues
  • Ignition system problems
  • Fuel system issues
  • Vacuum leaks
  • Bad ground connections
  • Sensor connector problems

Troubleshooting steps

  1. 1. Check the Code

    Use an OBD-II scanner to confirm the P0337 code and check for any additional codes that may provide more context

  2. 2. Inspect the Crankshaft Position Sensor

  3. 3. Locate the crankshaft position sensor, which is usually found near the crankshaft or flywheel

  4. 4. Check for physical damage, corrosion, or loose connections at the sensor and its wiring harness

  5. 5. Check Wiring and Connectors

  6. 6. Inspect the wiring for any signs of wear, fraying, or damage

  7. 7. Ensure that the connectors are clean and securely attached. Look for bent pins or corrosion

  8. 8. Test the Crankshaft Position Sensor

  9. 9. Use a multimeter to test the resistance of the sensor according to the manufacturer's specifications

  10. 10. If the resistance is outside the specified range, the sensor may need to be replaced

  11. 11. Check the Power and Ground

  12. 12. Verify that the sensor is receiving the correct voltage (usually 5V or 12V, depending on the vehicle)

  13. 13. Check the ground connection for continuity and ensure it is secure

  14. 14. Inspect the Timing Components

  15. 15. If the timing belt or chain is worn or has jumped a tooth, it can affect the crankshaft position sensor's readings. Inspect these components for wear or misalignment

  16. 16. Check for Interference

  17. 17. Ensure that there are no metal objects or other components that could interfere with the sensor's operation

  18. 18. Scan for Other Codes

  19. 19. If there are other related codes (e.g., P0340 for the camshaft position sensor), address those as they may be contributing to the issue

  20. 20. Clear the Codes and Test Drive

  21. 21. After performing the checks and repairs, clear the codes and take the vehicle for a test drive to see if the code reappears

  22. 22. Replace the Sensor

  23. 23. If all other checks are satisfactory and the code persists, consider replacing the crankshaft position sensor. 1

  24. 24. Consult a Professional

  25. 25. If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic for further diagnosis. By following these steps, you should be able to identify and resolve the issue related to the P0337 code