P2199 2014 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 2014 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 2014 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 2014 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 2014 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 2014 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 2014 GMC Sierra Code
What does the OBDII code P2199 mean for a 2014 GMC Sierra?
Code P2199 indicates that the intake air temperature (IAT) sensors 1 and 2 are providing inconsistent or implausible readings to the vehicle’s engine control module (ECM).
What are the common symptoms of P2199 on a 2014 GMC Sierra?
Symptoms may include poor engine performance, reduced fuel efficiency, difficulty starting, rough idling, or the check engine light being illuminated.
What causes the P2199 code to appear?
Common causes include faulty intake air temperature sensors, wiring issues (e.g., damaged or corroded connectors), or a malfunctioning engine control module (ECM).
How do I check the intake air temperature sensors for P2199?
You can use a multimeter to test the sensors’ resistance and compare the readings with the manufacturer’s specifications. Ensure both sensors are functioning and providing consistent readings.
Can a dirty air filter cause the P2199 code?
While unlikely, a severely clogged air filter can restrict airflow and potentially affect the IAT sensors’ readings. It’s worth inspecting and replacing the air filter if necessary.
Is it safe to drive with a P2199 code?
Driving with a P2199 code is generally possible, but it can lead to poor performance and reduced fuel efficiency. Prolonged driving without repair could cause further damage to the engine or components.
How do I fix the P2199 code on my 2014 GMC Sierra?
Repairs may include replacing a faulty intake air temperature sensor, repairing damaged wiring or connectors, cleaning sensors, or, in rare cases, reprogramming or replacing the ECM.
Can a vacuum leak trigger the P2199 code?
A vacuum leak is not a direct cause of P2199 but could contribute to engine performance issues that make the IAT sensor readings seem implausible.
How much does it cost to fix the P2199 code?
Repair costs vary depending on the issue. Replacing an IAT sensor typically costs $100-$300, including parts and labor. Wiring repairs or ECM replacement may cost more.
Do I need specialized tools to diagnose P2199?
Yes, an OBDII scanner and a multimeter are essential for diagnosing the code. An advanced scanner that can read live data is particularly helpful for comparing sensor readings.
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