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P code powertrain Medium severity

P247A Exhaust Gas Temperature Out of Range Bank 1 Sensor 3

The OBD2 code P247A indicates that the exhaust gas temperature (EGT) for Bank 1, Sensor 3 is outside the expected range, suggesting a potential issue with the sensor or the exhaust system

Definition

The OBD2 code P247A indicates that the exhaust gas temperature (EGT) for Bank 1, Sensor 3 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) software issues
  • Corroded or poor electrical connections
  • Faulty catalytic converter
  • Incorrect sensor calibration or installation

Common misdiagnoses

  • Faulty exhaust gas temperature sensor
  • Wiring issues or short circuits
  • Faulty engine control module (ECM)
  • Exhaust leaks
  • Incorrectly diagnosed catalytic converter issues
  • Misinterpretation of related OBDII codes
  • Faulty turbocharger or related components (if applicable)
  • Issues with the diesel particulate filter (DPF) in diesel engines

Troubleshooting steps

  1. 1. 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

  2. 2. Inspect the EGT Sensor

    Visual Inspection: Check the EGT sensor for physical damage, corrosion, or loose connections

  3. 3. Wiring and Connectors

    Inspect the wiring harness and connectors for signs of wear, fraying, or corrosion. Ensure that all connections are secure

  4. 4. Test the EGT Sensor

    Resistance Test: Use a multimeter to measure the resistance of the EGT sensor. Compare the readings to the manufacturer's specifications

  5. 5. Voltage Test

    With the engine running, check the voltage output of the sensor. It should fall within the specified range. If it’s out of range, the sensor may be faulty

  6. 6. Check for Exhaust Leaks

    Inspect the exhaust system for any leaks, especially near the EGT sensor. Exhaust leaks can cause incorrect readings from the sensor

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

    Ensure that the ECM is functioning properly. Sometimes, a software update or reprogramming may be necessary if the ECM is not processing the sensor data correctly

  8. 8. Check for Other Related Sensors

    Inspect other related sensors, such as upstream EGT sensors or oxygen sensors, as they can affect the readings of the EGT sensor in question

  9. 9. Clear the Codes and Test Drive

    After performing the checks and repairs, clear the trouble codes using the OBD-II scanner. Take the vehicle for a test drive to see if the code reappears

  10. 10. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the specific make and model of the vehicle. Manufacturers may have issued guidance on common issues related to the P247A code

  11. 11. Replace the EGT Sensor

    If all tests indicate that the sensor is faulty, replace the EGT sensor with a new one. Ensure that the replacement part is compatible with your vehicle

  12. 12. Seek Professional Help

    If you are unable to diagnose or resolve the issue, consider seeking help from a qualified mechanic or automotive technician who has experience with OBD-II diagnostics. By following these steps, you should be able to identify the cause of the P247A code and take appropriate action to resolve the issue