P2199 2015 GMC Sierra 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 2015 GMC Sierra 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.
Code P2199 2015 GMC Sierra Description
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.
What are the Possible Causes of the DTC P2199 2015 GMC Sierra?
- 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 2015 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.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P2199 2015 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 P2199 2015 GMC Sierra Code
1. What does the OBDII code P2199 mean on a 2015 GMC Sierra?
P2199 indicates a discrepancy between the readings of Intake Air Temperature (IAT) Sensor 1 and IAT Sensor 2, meaning their values are not plausible when compared.
2. What are the symptoms of the P2199 code on a 2015 GMC Sierra?
Symptoms may include reduced engine performance, poor fuel economy, rough idling, and, in some cases, the Check Engine Light illuminating.
3. What causes the P2199 code to trigger on a 2015 GMC Sierra?
Common causes include a faulty IAT Sensor 1 or 2, damaged wiring or connectors, a dirty or faulty mass airflow sensor, or an intake air leak.
4. Where are the IAT sensors located on a 2015 GMC Sierra?
IAT Sensor 1 is typically integrated into the mass airflow sensor, while IAT Sensor 2 is usually located in the intake manifold.
5. How do I fix the P2199 code on a 2015 GMC Sierra?
Repairs may involve replacing a faulty IAT sensor, repairing damaged wiring, cleaning the mass airflow sensor, or fixing intake air leaks.
6. Can I drive my 2015 GMC Sierra with a P2199 code?
While the vehicle may still run, driving with a P2199 code for an extended period could lead to reduced performance, poor fuel economy, and potential long-term engine damage.
7. How do I test the IAT sensors on a 2015 GMC Sierra?
You can use a multimeter to check the resistance of the sensors or monitor their readings with a scan tool to ensure they align with the expected temperature values.
8. Can a dirty air filter cause the P2199 code on a 2015 GMC Sierra?
A dirty air filter is unlikely to directly trigger P2199 but can contribute to airflow issues, potentially affecting sensor readings.
9. Does the P2199 code affect emissions on a 2015 GMC Sierra?
Yes, inconsistent IAT sensor data can lead to improper air-fuel mixture adjustments, potentially increasing emissions.
10. Is the P2199 code related to the mass airflow sensor on a 2015 GMC Sierra?
Yes, since IAT Sensor 1 is part of the mass airflow sensor, issues with the sensor or its wiring can trigger the P2199 code.
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