P0098 2018 GMC Sierra Code - Intake Air Temperature Sensor 2 Circuit High
Quick Answer
The P0098 code for a 2018 GMC Sierra indicates a problem with the Intake Air Temperature Sensor 2 Circuit being too high. Common causes include Faulty Intake Air Temperature Sensor 2: The sensor itself may be malfunctioning, providing incorrect temperature readings to the ECM, Wiring Issues: Damaged or corroded wiring in the sensor circuit can disrupt the signal between the sensor and the ECM, ECM Malfunction: A problem with the engine control module could cause it to misinterpret the signals from the IAT Sensor 2. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P0098 2018 GMC Sierra indicates Intake Air Temperature Sensor 2 Circuit High.
- Common causes
- Common causes include Faulty Intake Air Temperature Sensor 2: The sensor itself may be malfunctioning, providing incorrect temperature readings to the ECM, Wiring Issues: Damaged or corroded wiring in the sensor circuit can disrupt the signal between the sensor and the ECM, ECM Malfunction: A problem with the engine control module could cause it to misinterpret the signals from the IAT Sensor 2.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0098 2018 GMC Sierra Description
The P0098 code for a 2018 GMC Sierra indicates a problem with the Intake Air Temperature Sensor 2 Circuit being too high. The Intake Air Temperature Sensor (IAT) is a crucial component of the vehicle's engine management system, as it measures the temperature of the air entering the engine. This information is used by the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. When the ECM detects that the voltage signal from the IAT Sensor 2 is higher than expected, it triggers the P0098 code.
Common Causes of P0098 2018 GMC Sierra
- Faulty Intake Air Temperature Sensor 2: The sensor itself may be malfunctioning, providing incorrect temperature readings to the ECM.
- Wiring Issues: Damaged or corroded wiring in the sensor circuit can disrupt the signal between the sensor and the ECM.
- ECM Malfunction: A problem with the engine control module could cause it to misinterpret the signals from the IAT Sensor 2.
- Intake Air Leaks: Air leaks in the intake system can affect the temperature readings of the sensor, triggering the P0098 code.
- Sensor Placement: If the IAT Sensor 2 is placed too close to a heat source, it may read higher temperatures than the actual intake air temperature.
Symptoms of P0098 2018 GMC Sierra
- Check Engine Light: The most common symptom associated with the P0098 code is the illumination of the Check Engine Light on the vehicle's dashboard.
- Reduced Engine Performance: The engine may experience a decrease in power and responsiveness due to incorrect air-fuel mixture adjustments.
- Poor Fuel Efficiency: The vehicle may consume more fuel than usual, leading to decreased miles per gallon.
- Rough Idle: The engine may idle roughly or inconsistently due to the incorrect air-fuel ratio.
- Emission Issues: The vehicle may fail emissions tests due to increased emissions caused by the incorrect air-fuel mixture.
How to Fix P0098 2018 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the trouble code and perform further testing to pinpoint the exact cause of the high voltage signal from the IAT Sensor 2.
- Replace the Intake Air Temperature Sensor 2: If the sensor is faulty, replace it with a new one following the manufacturer's guidelines.
- Check Wiring: Inspect the wiring in the sensor circuit for any damage or corrosion. Repair or replace any faulty wiring as needed.
- Reset the ECM: Clear the trouble code from the ECM's memory and reset the system to see if the issue persists.
- Test Drive: After completing the repairs, take the vehicle for a test drive to ensure that the Check Engine Light does not reappear and that the engine performance and fuel efficiency have returned to normal.
Cost to Fix P0098 2018 GMC Sierra
The typical repair costs for addressing the P0098 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of replacing the Intake Air Temperature Sensor 2 can range from $50 to $150, while the labor costs for the repair can be around $80 to $150 per hour. Additional costs may apply if wiring repairs or ECM diagnostics are necessary. It's advisable to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the vehicle's specific condition and location.
Tech Notes for P0098 2018 GMC Sierra
User Submitted Video
Need more information about the P0098 2018 GMC Sierra code?
Need more information on how to fix the P0098 2018 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0098 2018 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0098 2018 GMC Sierra Code
What does the OBDII code P0098 mean on a 2018 GMC Sierra?
P0098 indicates an issue with the Intake Air Temperature (IAT) Sensor 2 Circuit, specifically a high voltage reading.
What are the common symptoms of code P0098 in a 2018 GMC Sierra?
Symptoms may include a check engine light, decreased fuel efficiency, reduced engine performance, or difficulty starting the vehicle.
What causes the P0098 code to appear on a 2018 GMC Sierra?
Possible causes include a faulty IAT sensor, damaged wiring or connectors, high resistance in the sensor circuit, or issues with the ECM.
Can I drive my 2018 GMC Sierra with the P0098 code?
While the vehicle may still be drivable, ignoring the code could lead to poor performance and potential damage to the engine over time.
How do I fix the P0098 code on a 2018 GMC Sierra?
Repairs may involve replacing the IAT sensor, repairing or replacing damaged wiring, or cleaning connectors to ensure proper electrical contact.
Where is the IAT sensor 2 located on a 2018 GMC Sierra?
The IAT sensor 2 is typically located in the intake manifold or air intake system, downstream from the primary IAT sensor.
How can I test the IAT sensor to diagnose code P0098 on a 2018 GMC Sierra?
You can use a multimeter to check the resistance of the sensor and inspect for abnormal readings compared to manufacturer specifications.
Does the P0098 code affect fuel economy on a 2018 GMC Sierra?
Yes, a malfunctioning IAT sensor can cause improper air-fuel mixture calculations, leading to decreased fuel efficiency.
What tools are needed to repair the P0098 code on a 2018 GMC Sierra?
Common tools include a multimeter, OBDII scanner, basic hand tools, and possibly electrical contact cleaner for connectors.
Will clearing the P0098 code fix the problem on a 2018 GMC Sierra?
Clearing the code may temporarily remove the check engine light, but if the underlying issue is not addressed, the code will likely return.
Discuss the causes and fixes for P0098 2018 GMC Sierra OBDII Code
Code P0098 2018 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.