P0098 2018 GMC Sierra Code - Intake Air Temperature Sensor 2 Circuit High
Quick Answer
The Intake Air Temperature (IAT) sensor 1 is a variable resistor that changes the voltage on the Engine Control Module (ECM) supplied 5 V signal circuit. Common causes include Faulty Intake Air Temperature (IAT) sensor, Intake Air Temperature sensor harness is open or shorted, Intake Air Temperature sensor circuit poor electrical connection. 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 (IAT) sensor, Intake Air Temperature sensor harness is open or shorted, Intake Air Temperature sensor circuit poor electrical connection.
- 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.
Code P0098 2018 GMC Sierra Description
What are the Possible Causes of the DTC P0098 2018 GMC Sierra?
- Faulty Intake Air Temperature (IAT) sensor
- Intake Air Temperature sensor harness is open or shorted
- Intake Air Temperature sensor circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0098 2018 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0098 2018 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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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
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