WOMS
P code powertrain Medium severity

P2084 Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 1 Sensor 2

The OBD2 code P2084 indicates that the exhaust gas temperature sensor for Bank 1, Sensor 2 is reporting a temperature that is outside the expected range or performance parameters, suggesting a potential issue with the...

Definition

The OBD2 code P2084 indicates that the exhaust gas temperature sensor for Bank 1, Sensor 2 is reporting a temperature that is outside the expected range or performance parameters, suggesting a potential issue with the sensor or the exhaust system

Common causes

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

Common misdiagnoses

  • Faulty exhaust gas temperature sensor
  • Wiring issues or short circuits in the sensor circuit
  • Faulty engine control module (ECM)
  • Incorrectly diagnosed catalytic converter issues
  • Misdiagnosed fuel system problems
  • Ignition system faults
  • Air intake system issues
  • Exhaust leaks
  • Other sensor failures (e.g., oxygen sensors)

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 any visible damage, corrosion, or loose connections. Ensure that the wiring harness and connectors are secure and free from damage

  3. 3. Sensor Location

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

  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 vary with temperature. If the voltage is outside the expected range, the sensor may be faulty

  6. 6. Inspect Wiring and Connectors

    Check the wiring harness for any signs of wear, fraying, or short circuits. Look for any signs of overheating or damage

  7. 7. Ensure that all connectors are clean and free of corrosion. A poor connection can lead to erroneous readings

  8. 8. Check for Exhaust Leaks

    Inspect the exhaust system for any leaks, especially near the EGT sensor. Exhaust leaks can affect sensor readings and lead to performance issues

  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 reprogramming that may be necessary

  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 P2084 code for your specific vehicle make and model. Manufacturers may have issued guidance or fixes for known issues

  12. 12. Seek Professional Help

    If you are unable to resolve the issue after these steps, consider seeking assistance from a qualified 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 P2084 code