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C0267 Pump Motor Circuit Open/Shorted

The OBD2 code C0267 indicates a malfunction in the pump motor circuit, specifically that the circuit is either open (disconnected) or shorted (incorrectly connected), affecting the operation of the pump motor

Definition

The OBD2 code C0267 indicates a malfunction in the pump motor circuit, specifically that the circuit is either open (disconnected) or shorted (incorrectly connected), affecting the operation of the pump motor

Common causes

  • Faulty pump motor
  • Open or shorted wiring
  • Corroded connectors
  • Failed relay
  • Blown fuse
  • Faulty control module
  • Poor ground connection

Common misdiagnoses

  • Faulty ABS control module
  • Bad wheel speed sensor
  • Damaged wiring or connectors
  • Faulty pump motor
  • Low brake fluid level
  • Corroded ground connections
  • Malfunctioning relay
  • Incorrectly installed or damaged brake components
  • Software issues in the ABS system
  • Battery or charging system problems

Troubleshooting steps

  1. 1. Visual Inspection

    Wiring and Connectors: Check the wiring harness and connectors related to the pump motor for any signs of damage, corrosion, or loose connections

  2. 2. Fuses

    Inspect the fuses related to the ABS or pump motor circuit. Replace any blown fuses

  3. 3. 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

  4. 4. Test the Pump Motor

    Direct Power Test: If accessible, apply direct power to the pump motor to see if it operates. If it does not run, the pump motor may be faulty and require replacement

  5. 5. Resistance Test

    Measure the resistance of the pump motor using a multimeter. Compare the reading to the manufacturer's specifications

  6. 6. Inspect the Relay

    If the pump motor is controlled by a relay, check the relay for proper operation. You can swap it with a similar relay in the fuse box to test if the relay is the issue

  7. 7. Check Ground Connections

    Ensure that the ground connections for the pump motor circuit are secure and free of corrosion. A poor ground can cause circuit issues

  8. 8. Test the Circuit

    Use a multimeter to check for continuity in the wiring between the pump motor and the control module. Look for any breaks or shorts in the wiring

  9. 9. Check for voltage at the pump motor connector when the system is activated. If there is no voltage, trace back to find where the circuit is open

  10. 10. Inspect the Control Module

    If all other components check out, the issue may lie within the ABS control module. Check for any software updates or known issues with the module

  11. 11. Clear Codes and Test Drive

    After performing repairs, clear the trouble codes and take the vehicle for a test drive to see if the code returns

  12. 12. Seek Professional Help

    If you are unable to resolve the issue after these steps, it may be best to consult a professional mechanic or technician who has experience with ABS systems. By following these steps, you should be able to identify and resolve the issue related to the C0267 code. Always ensure safety precautions are taken when working on vehicle electrical systems