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P code powertrain Medium severity

P2086 Exhaust Gas Temperature Sensor Circuit Range/Performance Bank 2 Sensor 2

The OBD2 code P2086 indicates a problem with the exhaust gas temperature sensor circuit for Bank 2 Sensor 2, specifically related to its range or performance, suggesting that the sensor is providing readings that are...

Definition

The OBD2 code P2086 indicates a problem with the exhaust gas temperature sensor circuit for Bank 2 Sensor 2, specifically related to its range or performance, suggesting that the sensor is providing readings that are outside the expected range

Common causes

  • Faulty exhaust gas temperature sensor
  • Wiring issues (shorts, opens, or corrosion)
  • Poor electrical connections
  • Exhaust leaks
  • Engine control module (ECM) issues
  • Faulty or damaged connectors
  • Incorrect sensor installation or positioning

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 catalytic converter
  • Issues with other temperature sensors
  • Fuel system problems
  • Air intake issues
  • Ignition system problems

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 multiple 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 checking the correct sensor (Bank 2, 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. If the resistance is outside the specified range, the sensor may be faulty

  5. 5. Voltage Check

    With the engine running, check the voltage output of the sensor. It should vary with temperature. If it remains constant or is out of range, the sensor may be defective

  6. 6. Inspect Wiring and Connectors

    Wiring Inspection: Look for frayed wires, shorts, or breaks in the wiring leading to the EGT sensor. Pay special attention to areas where the wiring may be exposed to heat or abrasion

  7. 7. Connector Check

    Ensure that the connectors are clean and securely attached. Corrosion or poor connections can lead to erroneous readings

  8. 8. Check for Exhaust Leaks

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

  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 P2086 code for your specific vehicle make and model. Manufacturers may have issued guidance on common issues and fixes

  12. 12. Professional Diagnosis

    If the problem persists after performing these steps, consider seeking help from a professional mechanic or technician who has experience with your vehicle make and model. By following these troubleshooting steps, you can systematically identify and address the underlying issue causing the P2086 code