WOMS
P code powertrain High severity

P0098 Intake Air Temperature Sensor 2 Circuit High Bank 1

The OBD2 code P0098 indicates that the Intake Air Temperature Sensor 2 circuit is reading a high voltage signal in Bank 1, which may suggest a malfunction in the sensor or its wiring

Definition

The OBD2 code P0098 indicates that the Intake Air Temperature Sensor 2 circuit is reading a high voltage signal in Bank 1, which may suggest a malfunction in the sensor or its wiring

Common causes

  • Faulty intake air temperature sensor 2
  • Open or shorted wiring in the sensor circuit
  • Poor electrical connections or corroded connectors
  • Faulty engine control module (ECM)
  • Intake air temperature sensor 2 circuit high resistance
  • Air intake duct leaks
  • Incorrect sensor installation or positioning

Common misdiagnoses

  • Faulty Intake Air Temperature Sensor
  • Wiring issues or short circuits in the sensor circuit
  • Engine Control Module (ECM) malfunction
  • Vacuum leaks
  • Mass Air Flow (MAF) sensor issues
  • Coolant temperature sensor problems
  • Air filter restrictions
  • Throttle body issues
  • Fuel system problems
  • Other sensor failures (e.g., MAP sensor)

Troubleshooting steps

  1. 1. Check the Vehicle's Service Manual

    Refer to the vehicle's service manual for specific information about the IAT sensor location, wiring diagrams, and specifications

  2. 2. Visual Inspection

    Inspect the IAT sensor and its wiring for any visible damage, such as frayed wires, corrosion, or loose connections

  3. 3. Check the connector for any signs of moisture or dirt that could affect the sensor's performance

  4. 4. Test the IAT Sensor

    Use a multimeter to measure the resistance of the IAT sensor at various temperatures. Compare the readings to the specifications provided in the service manual

  5. 5. If the resistance is outside the specified range, the sensor may be faulty and should be replaced

  6. 6. Check the Wiring and Connectors

    Inspect the wiring harness for continuity and shorts. Use a multimeter to check for continuity between the IAT sensor and the Engine Control Module (ECM)

  7. 7. Ensure that there are no open circuits or shorts to ground

  8. 8. Check for Other Codes

    Scan the vehicle for any other OBD-II codes that may be related to the intake air system or engine performance. Address any additional codes as they may provide further insight into the issue

  9. 9. Inspect the Air Intake System

    Check for any air leaks in the intake system that could affect the readings of the IAT sensor

  10. 10. Ensure that the air filter is clean and that there are no obstructions in the intake path

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

    If the sensor and wiring are functioning correctly, the issue may lie with the ECM. Check for software updates or reprogramming if necessary

  12. 12. In some cases, a faulty ECM can cause incorrect readings from the IAT sensor

  13. 13. Clear the Codes and Test Drive

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

  14. 14. Take the vehicle for a test drive to see if the code returns. Monitor the IAT readings with a scan tool to ensure they are within the normal range

  15. 15. Seek Professional Help

    If the issue persists after following these steps, it may be best to consult a professional mechanic or technician who has experience with your specific vehicle make and model. By following these troubleshooting steps, you should be able to identify and resolve the issue related to the P0098 code