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P code powertrain Medium severity

P1229 Intercooler Pump Driver Fault

The OBD2 code P1229 indicates a fault with the intercooler pump driver, which is responsible for controlling the operation of the intercooler pump in a vehicle's forced induction system

Definition

The OBD2 code P1229 indicates a fault with the intercooler pump driver, which is responsible for controlling the operation of the intercooler pump in a vehicle's forced induction system

Common causes

  • Faulty intercooler pump
  • Wiring issues or damaged connectors
  • Failed pump driver module
  • Blown fuse
  • Short circuit in the wiring
  • Corroded terminals
  • Poor ground connection
  • Software issues in the engine control module (ECM)

Common misdiagnoses

  • Faulty intercooler pump
  • Wiring issues or short circuits
  • Faulty engine control module (ECM)
  • Incorrectly diagnosed turbocharger issues
  • Air intake system problems
  • Cooling system malfunctions
  • Faulty sensors related to boost pressure or temperature
  • Vacuum leaks
  • Fuel system issues
  • Exhaust system restrictions

Troubleshooting steps

  1. 1. Check for Additional Codes

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

  2. 2. Inspect the Intercooler Pump

  3. 3. Locate the intercooler pump and visually inspect it for any signs of damage, corrosion, or leaks

  4. 4. Ensure that the pump is securely mounted and that there are no loose connections

  5. 5. Test the Intercooler Pump

  6. 6. If possible, test the pump by applying direct power to it to see if it operates. If it does not run, the pump may be faulty and need replacement

  7. 7. Check the pump's electrical connector for corrosion or damage

  8. 8. Check the Wiring and Connectors

  9. 9. Inspect the wiring harness and connectors leading to the intercooler pump for any signs of wear, fraying, or damage

  10. 10. Ensure that all connections are secure and free of corrosion

  11. 11. Test the Intercooler Pump Relay

  12. 12. If the vehicle uses a relay to control the intercooler pump, test the relay to ensure it is functioning properly. You can swap it with a similar relay in the fuse box to see if that resolves the issue

  13. 13. Check the Control Module

  14. 14. The engine control module (ECM) or powertrain control module (PCM) may be responsible for controlling the intercooler pump. Check for any software updates or known issues with the module

  15. 15. If you have access to a scan tool, you can monitor the pump control signal from the ECM to see if it is sending the correct signal to the pump

  16. 16. Inspect Fuses

  17. 17. Check the fuses related to the intercooler pump circuit. A blown fuse can prevent the pump from operating

  18. 18. Perform a Voltage Drop Test

  19. 19. Use a multimeter to perform a voltage drop test on the wiring to the pump. This can help identify any issues with the wiring that may be causing insufficient power to reach the pump

  20. 20. Clear the Code and Test Drive

  21. 21. After performing the necessary repairs, clear the trouble code using the OBD-II scanner and take the vehicle for a test drive to see if the code returns

  22. 22. Consult a Professional

  23. 23. If you are unable to diagnose or resolve the issue after 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 should be able to identify and resolve the issue related to the P1229 code