AutoCodes – GMC – P2199 GMC

P2199 GMC Code - Intake Air Temperature Sensor 1-2 Not Plausible

Quick Answer

The following sensors are integrated within the Mass Air Flow/Multifunction Intake Air Sensor: IAT sensor 1, IAT sensor 2, Humidity sensor, MAF sensor, and BARO pressure sensor. Common causes include Faulty Intake Air Temperature (IAT) (integrated within Mass Air Flow/Multifunction Intake Air Sensor), Intake Air Temperature harness is open or shorted, Intake Air Temperature 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: P2199 GMC indicates Intake Air Temperature Sensor 1-2 Not Plausible.
Common causes: Common causes include Faulty Intake Air Temperature (IAT) (integrated within Mass Air Flow/Multifunction Intake Air Sensor), Intake Air Temperature harness is open or shorted, Intake Air Temperature 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.

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Code Popularity 3,665

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P2199 GMC Description

The following sensors are integrated within the Mass Air Flow/Multifunction Intake Air Sensor: IAT sensor 1, IAT sensor 2, Humidity sensor, MAF sensor, and BARO pressure sensor.
The Intake Air Temperature (IAT) Sensor is a variable resistor that changes the voltage on the Engine Control Module (ECM) supplied 5 V signal circuit. The signal varies with the inlet air temperature in the sensor bore. The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the absolute difference between the IAT sensor 1 and the IAT sensor 2 temperatures is greater than 55°C (99°F) for longer than 5 s.

OBDII Code P2199 GMC - Intake Air Temperature Sensor 1-2 Not Plausible - AutoCodes.com — P2199 GMC Code - Intake Air Temperature Sensor 1-2 Not Plausible

What does this mean?

What are the Possible Causes of the DTC P2199 GMC?

Faulty Intake Air Temperature (IAT) (integrated within Mass Air Flow/Multifunction Intake Air Sensor)
Intake Air Temperature harness is open or shorted
Intake Air Temperature circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P2199 GMC?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P2199 GMC 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.

Need more information about the P2199 GMC code?

Need more information on how to fix the P2199 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P2199 GMC code diagnosed by a professional: Find a repair shop in your area

Information for Specific GMC Models

P2199 2014 GMC Sierra — Intake Air Temperature Sensor 1-2 Not Plausible
P2199 2015 GMC Sierra — Intake Air Temperature Sensor 1-2 Not Plausible
P2199 2016 GMC Sierra — Intake Air Temperature Sensor 1-2 Not Plausible
P2199 2017 GMC Sierra — Intake Air Temperature Sensor 1-2 Not Plausible
P2199 2018 GMC Sierra — Intake Air Temperature Sensor 1-2 Not Plausible

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P2199 GMC Code

1. What are common symptoms of OBDII code P2199 GMC (Intake Air Temperature Sensor 1-2 Not Plausible)?

The common symptoms of code P2199 include poor engine performance, rough idling, reduced fuel efficiency, and potential stalling.

2. What does the OBDII code P2199 GMC indicate?

OBDII code P2199 indicates that the intake air temperature sensor readings for cylinders 1 and 2 are not within the expected range, causing the engine control module to trigger a fault.

3. What are the possible causes of OBDII code P2199 GMC?

Possible causes of code P2199 include a faulty intake air temperature sensor, wiring issues, a vacuum leak, intake air leaks, or problems with the engine control module.

4. How can I diagnose the cause of OBDII code P2199 GMC?

Diagnosing code P2199 involves checking the intake air temperature sensor and its wiring for any damage or corrosion. A smoke test can help identify vacuum or intake air leaks that may be contributing to the issue.

5. Can driving with OBDII code P2199 GMC cause further damage to the vehicle?

Continuing to drive with code P2199 may lead to decreased engine performance, reduced fuel efficiency, and potential damage to other engine components over time. It is recommended to address the issue promptly.

6. How can I repair OBDII code P2199 GMC?

Repairing code P2199 typically involves replacing the faulty intake air temperature sensor, repairing any damaged wiring, fixing vacuum or intake air leaks, or addressing issues with the engine control module.

7. Is it safe to clear the OBDII code P2199 GMC without repairing the issue?

Clearing the code without addressing the underlying problem may temporarily turn off the check engine light, but the issue will likely reoccur. It is important to diagnose and repair the root cause of the code.

8. Can a DIY enthusiast fix OBDII code P2199 GMC at home?

Depending on the DIYer's skill level and access to tools, it may be possible to address code P2199 at home by following repair guides or tutorials. However, some cases may require professional diagnosis and repair.

9. How much does it cost to repair OBDII code P2199 GMC at a mechanic or dealership?

The cost of repairing code P2199 can vary depending on the cause of the issue, the labor rates of the mechanic or dealership, and the cost of any replacement parts needed. It is recommended to obtain a quote for an accurate estimate.

10. Can code P2199 GMC trigger other related OBDII codes?

In some cases, code P2199 may be accompanied by other related codes, such as intake air temperature sensor circuit low, intake air temperature sensor circuit high, or cylinder misfire codes. It is important to address all relevant codes during diagnosis and repair.