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P code powertrain Medium severity

P2229 Barometric Pressure Sensor "A" Circuit High

The OBD2 code P2229 indicates that the Barometric Pressure Sensor "A" is reporting a voltage that is higher than the expected range, suggesting a potential issue with the sensor or its circuit

Definition

The OBD2 code P2229 indicates that the Barometric Pressure Sensor "A" is reporting a voltage that is higher than the expected range, suggesting a potential issue with the sensor or its circuit

Common causes

  • Faulty barometric pressure sensor
  • Open or shorted wiring in the sensor circuit
  • Corroded or damaged connectors
  • Faulty engine control module (ECM)
  • Vacuum leaks
  • Incorrectly calibrated sensor
  • Electrical interference or noise in the circuit

Common misdiagnoses

  • Faulty Mass Air Flow (MAF) Sensor
  • Faulty Manifold Absolute Pressure (MAP) Sensor
  • Vacuum Leaks
  • Faulty Engine Control Module (ECM)
  • Wiring Issues or Short Circuits
  • Faulty Throttle Position Sensor (TPS)
  • Fuel Pressure Issues
  • Exhaust Leaks
  • Incorrectly Installed or Damaged Barometric Pressure Sensor
  • Air Intake System Issues

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 additional context for the issue

  2. 2. Inspect the Barometric Pressure Sensor

    Locate the barometric pressure sensor (often found in the intake manifold or near the air filter)

  3. 3. Check for physical damage, corrosion, or loose connections at the sensor

  4. 4. Test the Sensor

    Disconnect the sensor and use a multimeter to check the resistance and voltage output according to the manufacturer's specifications

  5. 5. If the readings are outside the specified range, the sensor may be faulty and should be replaced

  6. 6. Check Wiring and Connectors

    Inspect the wiring harness and connectors leading to the barometric pressure sensor for any signs of damage, fraying, or corrosion

  7. 7. Ensure that all connections are secure and free of moisture or dirt

  8. 8. Check for Short Circuits

    Use a multimeter to check for shorts in the wiring. A short to power could cause the high voltage reading

  9. 9. Check for continuity in the wiring to ensure there are no breaks

  10. 10. Inspect the Engine Control Module (ECM)

    If the sensor and wiring are in good condition, the issue may lie with the ECM

  11. 11. Check for any software updates or recalls related to the ECM

  12. 12. If necessary, consult a professional to test the ECM for faults

  13. 13. Clear the Code and Test Drive

    After performing the checks and repairs, clear the trouble code using the OBD-II scanner

  14. 14. Take the vehicle for a test drive to see if the code returns

  15. 15. Consult a Professional

    If the issue persists after performing the above steps, it may be necessary to consult a professional mechanic for further diagnosis.Additional Tips: - Always refer to the vehicle's service manual for specific testing procedures and specifications. - Ensure that the vehicle is at operating temperature when performing tests, as some sensors may behave differently when cold. By following these steps, you should be able to identify and resolve the issue related to the P2229 code