P0111 2015 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 2015 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 2015 GMC Sierra Description
What are the Possible Causes of the DTC P0111 2015 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 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.
Code Tech Notes
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0111 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 P0111 2015 GMC Sierra Code
1. What does the OBDII code P0111 mean on a 2015 GMC Sierra?
P0111 indicates an "Intake Air Temperature (IAT) Circuit Range/Performance Problem," meaning the signal from the IAT sensor is outside the expected range.
2. What are the symptoms of a P0111 code on a 2015 GMC Sierra?
Common symptoms include poor fuel economy, rough idling, reduced engine performance, and sometimes the engine may enter limp mode.
3. What causes the P0111 code on a 2015 GMC Sierra?
Potential causes include a faulty IAT sensor, wiring issues (damaged or corroded), a dirty or clogged air intake, or a malfunctioning engine control module (ECM).
4. Can a dirty air filter trigger a P0111 code?
Yes, a dirty or clogged air filter can restrict airflow and cause inaccurate readings from the IAT sensor, potentially triggering the P0111 code.
5. How can I fix the P0111 code on my 2015 GMC Sierra?
Start by inspecting and cleaning the IAT sensor and air intake components. Replace the IAT sensor if faulty and check for damaged wiring or connectors. Clear the code and test drive to see if it returns.
6. Where is the IAT sensor located on a 2015 GMC Sierra?
The IAT sensor is typically located in the air intake tube between the air filter box and the throttle body or integrated into the mass airflow (MAF) sensor.
7. Can I drive my 2015 GMC Sierra with a P0111 code?
While the truck may still run, driving with a P0111 code can result in poor performance and fuel economy. It’s best to address the issue promptly to avoid potential long-term damage.
8. How much does it cost to fix the P0111 code on a 2015 GMC Sierra?
Repair costs vary, but replacing the IAT sensor typically costs between $50 and $150, including parts and labor. Wiring repairs or ECM issues may increase costs.
9. Will clearing the code fix the P0111 issue on a 2015 GMC Sierra?
Clearing the code will temporarily turn off the check engine light, but if the underlying issue isn’t resolved, the code will likely return.
10. Can extreme weather conditions cause a P0111 code?
Yes, extreme hot or cold weather can sometimes affect the IAT sensor's performance, especially if the sensor is already failing or the air intake system has issues.
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