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P code powertrain Medium severity

P247C Exhaust Gas Temperature Sensor 2 Circuit Range/Performance Problem (Bank 1)

The OBD2 code P247C indicates a problem with the performance or range of the exhaust gas temperature sensor 2 circuit on bank 1 of the engine, suggesting that the sensor is not providing accurate readings or is...

Definition

The OBD2 code P247C indicates a problem with the performance or range of the exhaust gas temperature sensor 2 circuit on bank 1 of the engine, suggesting that the sensor is not providing accurate readings or is malfunctioning

Common causes

  • Faulty exhaust gas temperature sensor 2
  • Wiring issues (shorts, opens, or corrosion)
  • Poor electrical connections
  • Exhaust leaks
  • Engine control module (ECM) issues
  • Faulty or damaged connectors
  • Incorrect sensor calibration or installation
  • High exhaust temperatures due to engine performance issues

Common misdiagnoses

  • Faulty exhaust gas temperature sensor
  • Wiring issues or short circuits in the sensor circuit
  • Faulty engine control module (ECM)
  • Exhaust leaks
  • Incorrectly installed or damaged exhaust components
  • Faulty turbocharger or related components (if applicable)
  • Misdiagnosed as a catalytic converter issue
  • Fuel system problems affecting combustion temperatures
  • Ignition system issues
  • Air intake problems affecting engine performance

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

    Visual Inspection: Check the EGT sensor for any visible damage, corrosion, or loose connections. Ensure that the wiring harness and connectors are intact and free from any signs of wear or damage

  3. 3. Sensor Location

    Confirm that you are inspecting the correct sensor (EGT Sensor 2 for Bank 1)

  4. 4. Test the EGT Sensor

    Resistance Check: Use a multimeter to measure the resistance of the EGT sensor. Compare the readings to the manufacturer’s specifications. A significant deviation may indicate a faulty sensor

  5. 5. Voltage Check

    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. Inspect Wiring and Connectors

    Wiring Inspection: Look for any frayed wires, shorts, or open circuits in the wiring leading to the EGT sensor. Repair or replace any damaged wiring

  7. 7. Connector Check

    Ensure that the connectors are clean and securely connected. Corrosion or loose connections can lead to performance issues

  8. 8. Check for Exhaust Leaks

    Inspect the exhaust system for any leaks that could affect the readings of the EGT sensor. Exhaust leaks can lead to incorrect temperature readings

  9. 9. Test the Engine Control Module (ECM)

    If the sensor and wiring appear to be in good condition, the issue may lie with the ECM. Check for any software updates or known issues with the ECM that could affect sensor readings

  10. 10. Clear Codes and Test Drive

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

  11. 11. Consult Technical Service Bulletins (TSBs)

    Check for any TSBs related to the P247C code for your specific vehicle make and model. Manufacturers may have issued guidance or fixes for known issues

  12. 12. Professional Diagnosis

    If the problem persists after performing the above steps, consider seeking help from a professional mechanic or technician who has experience with your vehicle’s make and model.Conclusion By following these troubleshooting steps, you can systematically identify and address the cause of the P247C code. Always refer to the vehicle’s service manual for specific diagnostic procedures and specifications