P0098 Fault Code

P0098 OBD-II Trouble Code Short Description

Intake Air Temperature Sensor 2 Circuit High Bank 1

What does trouble code P0098 mean?

P0098 is a diagnostic trouble code (DTC) that stands for "Intake Air Temperature Sensor 2 Circuit High Bank 1." This code indicates that the powertrain control module (PCM) has detected a high voltage signal from the intake air temperature (IAT) sensor 2, which is located in the air intake system of the engine.

The intake air temperature sensor is crucial for the engine to determine the optimal air-fuel mixture for combustion. When the sensor sends a high voltage signal, it can result in issues such as poor engine performance, rough idling, reduced fuel efficiency, and increased emissions.

The most common causes of the P0098 code are a faulty intake air temperature sensor, a damaged sensor wiring harness, or a problem with the PCM. To resolve this issue, one should start by inspecting the sensor and its wiring for any visible damage or corrosion. If no issues are found, it may be necessary to replace the sensor or have a professional technician diagnose the problem further.

Ignoring the P0098 code and not addressing the underlying issue can lead to continued poor performance and potential damage to the engine over time. It's crucial to address any fault codes promptly to ensure the proper functioning and longevity of your vehicle.


What are the symptoms of the P0098 code?

When a car displays the P0098 fault code, which indicates a high circuit reading from the Intake Air Temperature Sensor 2 on Bank 1, the following symptoms may be observed:

  • Check Engine Light illuminated
  • Decreased fuel efficiency
  • Engine may run rough or stall
  • Reduced engine performance


What causes the P0098 code?

When you see the P0098 fault code on cars, it indicates an issue with the Intake Air Temperature Sensor 2 Circuit High Bank 1. This fault code commonly occurs due to the following reasons:

  • Faulty intake air temperature sensor
  • Poor electrical connection or wiring to the sensor
  • Intake air temperature sensor circuit shorted to power
  • Faulty Engine Control Module (ECM)

These issues can lead to improper air-fuel mixture, affecting engine performance and fuel efficiency. It is recommended to have a professional mechanic diagnose and resolve the specific cause of the P0098 fault code.

Possible Solutions

How to fix P0098?

To fix the P0098 fault code on cars, follow these steps:

  1. Check the wiring and connectors of the intake air temperature sensor 2.
  2. Inspect the intake air temperature sensor 2 for any damage or malfunction.
  3. Verify the resistance of the sensor using a multimeter.
  4. Replace the intake air temperature sensor 2 if it is faulty or damaged.
  5. Clear the fault code using an OBD-II scanner.
  6. Test drive the car to ensure the issue has been resolved.

Make sure to consult a professional mechanic if you are unsure about performing these steps yourself.