P0098 Code: IAT Sensor 2 Circuit High (Bank 1)

Reviewed by

Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Written by CarParts.com Research Team - Updated on June 27th, 2024

Reading Time: 3 minutes
Summary
  • The diagnostic trouble code (DTC) P0098 means “IAT Sensor 2 Circuit High (Bank 1).”
  • The powertrain control module (PCM) will log this code if it detects a higher-than-normal signal voltage for sensor #2.
  • Common causes of the P0098 code are a malfunctioning IAT sensor #2, wiring issues, or a malfunctioning PCM.
  • The symptoms of a P0098 code are an illuminated check engine light, decreased engine performance, and reduced fuel economy.

P0098 is a diagnostic trouble code related to one of your vehicle’s intake air temperature sensors. Here is some basic information that can help you understand the common triggers and symptoms associated with this code.

What Does the P0098 Code Mean?

Diagnostic Trouble Code (DTC) P0098 stands for “IAT Sensor 2 Circuit High (Bank 1).” This code is logged once the PCM detects a possible issue in the intake air temperature (IAT) sensor #2. It is set when the PCM detects a signal voltage that’s higher than the manufacturer-specified range for sensor #2.

The IAT sensor measures the temperature of the air entering the vehicle’s engine. This device is equipped with an internal thermistor that measures air temperature and sends voltage signals to the PCM.

Diagnostic Trouble Code (DTC) P0098 stands for “IAT Sensor 2 Circuit High (Bank 1).”

Read our technical discussion about the IAT sensor and how it can trigger codes like P0098 to get more information that can help you fix the issue.

Note: The definition of code P0098 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What are the Possible Causes of the P0098 Code?

Here are the possible triggers of the P0098 code:

  • Malfunctioning IAT sensor # 2
  • Wiring issues
  • Malfunctioning PCM

What are the Common Symptoms of a P0098 Code?

One of the symptoms of code P0098 is decreased fuel economy.

Here are some symptoms related to the code:

In most cases, this trouble code may not cause any drivability issue.

How to Diagnose the P0098 Code

If you don’t have extensive experience in auto repair, we advise bringing your vehicle to an auto shop. A mechanic would be able to identify underlying issues that may have triggered the code or caused it to be logged in error.

If you’re a seasoned automotive DIYer who wants to troubleshoot this code yourself, we recommend consulting vehicle-specific repair manuals and/or online repair databases. These resources contain helpful information on the diagnostic procedures that may work for your vehicle.

How to Fix the P0098 Code

There are no guaranteed easy fixes for DTCs, and the same applies to problems related to a code P0098. This is because engine and vehicle specifications may vary per manufacturer. Repair steps that may work for a P0098 on a Ford may not work for a P0098 on a Honda. Always consult the appropriate repair manual or subscribe to an online repair database to learn more about the proper repair procedure.

Get Vehicle Parts After a Triggered P0098 Code

A bad IAT sensor can trigger the P0098 code and cause decreased engine performance and efficiency. This might not be a major concern, but it can snowball into larger issues in the long run. You shouldn’t ignore a bad IAT sensor. Luckily, here at CarParts.com, you’ll be able to find the right replacement IAT sensor for your vehicle with just a few clicks.

CarParts.com has a great selection of parts that aren’t limited to IAT sensors. Choose from a wide range of parts and accessories for various vehicle systems. Whatever part you pick, you can be confident that it’ll fit properly and perform reliably. All our parts are sourced from leading aftermarket manufacturers and have passed stringent quality control standards.

Whatever parts you choose, you can rest assured that they’ll last. What are you waiting for? Enjoy our deals on IAT sensors here at CarParts.com today!

About The Authors
Reviewed By Richard McCuistian, ASE Certified Master Automobile Technician

Technical Reviewer at CarParts.com

Richard McCuistian has worked for nearly 50 years in the automotive field as a professional technician, an instructor, and a freelance automotive writer for Motor Age, ACtion magazine, Power Stroke Registry, and others. Richard is ASE certified for more than 30 years in 10 categories, including L1 Advanced Engine Performance and Light Vehicle Diesel.

Written By CarParts.com Research Team

Automotive and Tech Writers

The CarParts.com Research Team is composed of experienced automotive and tech writers working with (ASE)-certified automobile technicians and automotive journalists to bring up-to-date, helpful information to car owners in the US. Guided by CarParts.com's thorough editorial process, our team strives to produce guides and resources DIYers and casual car owners can trust.

Any information provided on this Website is for informational purposes only and is not intended to replace consultation with a professional mechanic. The accuracy and timeliness of the information may change from the time of publication.

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Published by
CarParts.com Research Team and Richard McCuistian, ASE Certified Master Automobile Technician
Tags: iat-sensor