P0111 2014 GMC Sierra Code - Intake Air Temperature Circuit Range/Performance Problem
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
- P0111 2014 GMC Sierra indicates Intake Air Temperature Circuit Range/Performance Problem.
- 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 P0111 2014 GMC Sierra Description
What are the Possible Causes of the DTC P0111 2014 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 P0111 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.
Code Tech Notes
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0111 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 P0111 2014 GMC Sierra Code
1. What does the OBDII code P0111 mean on a 2014 GMC Sierra?
P0111 indicates an "Intake Air Temperature (IAT) Circuit Range/Performance Problem," meaning the IAT sensor is providing readings outside the expected range.
2. What are the common symptoms of code P0111 in a 2014 GMC Sierra?
Symptoms may include poor engine performance, rough idling, decreased fuel efficiency, difficulty starting, or an illuminated check engine light.
3. What causes the P0111 code on a 2014 GMC Sierra?
Common causes include a faulty IAT sensor, wiring issues like damaged or corroded connections, a dirty air filter, or an issue with the engine control module (ECM).
4. Can a dirty air filter trigger the P0111 code?
Yes, a dirty or clogged air filter can obstruct airflow, causing incorrect intake air temperature readings and triggering the P0111 code.
5. How do you diagnose the P0111 code on a 2014 GMC Sierra?
Diagnosis involves checking the IAT sensor's voltage readings, inspecting the wiring and connectors for damage, ensuring the air filter is clean, and using a scan tool to monitor live data.
6. Is it safe to drive with a P0111 code on a 2014 GMC Sierra?
While the vehicle may still be drivable, ignoring the code can lead to poor fuel economy and potentially damage the engine if the issue is not addressed promptly.
7. How do you fix the P0111 code on a 2014 GMC Sierra?
Repairs may include replacing the IAT sensor, cleaning or replacing the air filter, repairing damaged wiring or connectors, or updating/reprogramming the ECM if necessary.
8. Where is the Intake Air Temperature (IAT) sensor located on a 2014 GMC Sierra?
The IAT sensor is typically integrated into the Mass Airflow (MAF) sensor or installed in the intake air duct near the throttle body.
9. How much does it cost to fix the P0111 code on a 2014 GMC Sierra?
Repair costs can range from $50 for a DIY air filter replacement to $200-$400 for professional diagnostics and sensor replacement.
10. Can a bad IAT sensor cause other issues besides triggering the P0111 code?
Yes, a faulty IAT sensor can result in incorrect air-fuel mixture calculations, leading to poor performance, increased emissions, and potential engine damage over time.
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