Error code

OBD2 P0098

OBD2P0098
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Intake Air Temperature Sensor 2 Circuit High.

Severity

moderateThe vehicle can usually be driven, but performance may suffer.

Summary

P0098 indicates that the second intake air temperature sensor (IAT2) is reporting an abnormally high temperature reading to the engine control module (ECM). This sensor measures air temperature after it passes through the turbocharger or supercharger.

Symptoms

  • Malfunction indicator light (MIL) illuminated
  • Poor engine performance, especially during acceleration

Common Causes

  • Wiring short to positive
  • Faulty IAT2 sensor
  • Intercooler or cooling system issues leading to overheating

Diagnosis

  1. Check the IAT2 sensor connector for proper seating and damage
  2. Use a scan tool to monitor live data from the IAT2 sensor
  3. Perform resistance checks on the sensor and wiring harness

Fixes

  • Replace faulty IAT2 sensor or repair damaged wiring

FAQ

What should I do if my MIL is on due to P0098?

Start by checking the IAT2 sensor and its wiring. If issues are found, replace them or repair as necessary.

Can poor weather conditions cause this code?

Yes, extreme temperatures can sometimes trigger this code if the ECM misinterprets temperature readings.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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