WOMS
P code powertrain Medium severity

P2479 Exhaust Gas Temperature Out of Range Bank 1 Sensor 2

The OBD2 code P2479 indicates that the exhaust gas temperature (EGT) sensor for Bank 1, Sensor 2 is reporting a temperature that is outside the expected range, suggesting a potential issue with the sensor or the exhaust...

Definition

The OBD2 code P2479 indicates that the exhaust gas temperature (EGT) sensor for Bank 1, Sensor 2 is reporting a temperature that is outside the expected range, suggesting a potential issue with the sensor or the exhaust system

Common causes

  • Faulty exhaust gas temperature sensor
  • Wiring issues or damaged connectors
  • Exhaust leaks
  • Engine control module (ECM) issues
  • Incorrect sensor calibration
  • High exhaust temperatures due to engine problems
  • Poor electrical connections or corrosion

Common misdiagnoses

  • Faulty exhaust gas temperature sensor
  • Wiring issues or short circuits
  • Faulty engine control module (ECM)
  • Exhaust leaks
  • Incorrectly calibrated or malfunctioning turbocharger
  • Faulty catalytic converter
  • Issues with the intake air temperature sensor
  • Misdiagnosed fuel system problems

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 EGT Sensor

    Locate the EGT sensor for Bank 1, Sensor 2. Check for physical damage, corrosion, or loose connections

  3. 3. Ensure that the sensor is properly connected and that the wiring harness is intact

  4. 4. Test the EGT Sensor

    Use a multimeter to test the resistance of the EGT sensor. Compare the readings to the manufacturer's specifications

  5. 5. If the sensor is out of spec, it may need to be replaced

  6. 6. Check Wiring and Connectors

    Inspect the wiring and connectors leading to the EGT sensor for any signs of wear, fraying, or damage

  7. 7. Look for any signs of short circuits or open circuits in the wiring

  8. 8. Examine the Exhaust System

    Check for any exhaust leaks or blockages that could affect the temperature readings

  9. 9. Ensure that the exhaust system is functioning properly and that there are no restrictions

  10. 10. Check Engine Coolant Temperature

    Sometimes, an incorrect engine coolant temperature can affect exhaust gas temperature readings. Ensure that the engine is operating within the normal temperature range

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

    In rare cases, the ECM may be malfunctioning or have a software issue. Check for any available updates or reprogramming options

  12. 12. Clear Codes and Test Drive

    After performing any repairs or replacements, clear the trouble codes using the OBD-II scanner

  13. 13. Take the vehicle for a test drive to see if the code returns. Monitor the EGT readings to ensure they are within the expected range

  14. 14. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the P2479 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  15. 15. Seek Professional Help

    If the issue persists after performing the above steps, it may be best to consult a professional mechanic or technician who has experience with your vehicle's make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P2479 code