P1111 2017 GMC Sierra Code - Intake Air Temperature Sensor Circuit Intermittent High Voltage
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 (Integrated within the Mass Air Flow / Multifunction Intake Air 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
- P1111 2017 GMC Sierra indicates Intake Air Temperature Sensor Circuit Intermittent High Voltage.
- Common causes
- Common causes include Faulty Intake Air Temperature (IAT) sensor (Integrated within the Mass Air Flow / Multifunction Intake Air 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 P1111 2017 GMC Sierra Description
What are the Possible Causes of the DTC P1111 2017 GMC Sierra?
- Faulty Intake Air Temperature (IAT) sensor (Integrated within the Mass Air Flow / Multifunction Intake Air 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 P1111 2017 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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P1111 2017 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 P1111 2017 GMC Sierra Code
1. What are the common symptoms of OBDII code P1111 on a 2017 GMC Sierra related to the Intake Air Temperature Sensor Circuit Intermittent High Voltage?
- Common symptoms may include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.
2. What are the possible causes of OBDII code P1111 on a 2017 GMC Sierra indicating an Intake Air Temperature Sensor Circuit Intermittent High Voltage issue?
- Causes may include a faulty intake air temperature sensor, damaged wiring or connectors, a vacuum leak, or a problem with the engine control module.
3. How can I diagnose the Intake Air Temperature Sensor Circuit Intermittent High Voltage issue causing OBDII code P1111 on my 2017 GMC Sierra?
- Use a multimeter to test the intake air temperature sensor for proper resistance, check the sensor's wiring and connectors for damage, and inspect the intake system for leaks.
4. Can a dirty air filter trigger OBDII code P1111 on a 2017 GMC Sierra related to the Intake Air Temperature Sensor Circuit Intermittent High Voltage?
- Yes, a dirty air filter can disrupt the airflow and affect the intake air temperature readings, potentially causing the sensor to report intermittent high voltage.
5. Is it safe to continue driving my 2017 GMC Sierra with OBDII code P1111 due to an Intake Air Temperature Sensor Circuit Intermittent High Voltage issue?
- It is generally not recommended to drive the vehicle for an extended period with this issue, as it can lead to further engine problems and potential damage.
6. Will resetting the OBDII code P1111 on my 2017 GMC Sierra related to the Intake Air Temperature Sensor Circuit Intermittent High Voltage solve the problem?
- Resetting the code may temporarily clear the warning light, but it will not fix the underlying issue causing the high voltage readings from the intake air temperature sensor.
7. Can a DIY enthusiast repair the Intake Air Temperature Sensor Circuit Intermittent High Voltage problem causing OBDII code P1111 on a 2017 GMC Sierra?
- Depending on the root cause, some DIY repairs like sensor replacement or checking for loose connections may be possible, but complex issues may require professional diagnosis and repair.
8. How much does it typically cost to repair the Intake Air Temperature Sensor Circuit Intermittent High Voltage issue triggering OBDII code P1111 on a 2017 GMC Sierra?
- Repair costs can vary based on the exact cause of the problem, but expenses may include parts like a new sensor, labor for diagnosis and repair, and potentially additional components if needed.
9. Are there any preventive maintenance steps I can take to avoid encountering OBDII code P1111 on my 2017 GMC Sierra due to an Intake Air Temperature Sensor Circuit Intermittent High Voltage issue?
- Regularly inspecting and cleaning the intake system, ensuring proper air filter maintenance, and addressing any engine performance issues promptly can help prevent this problem.
10. Can extreme weather conditions or driving environments contribute to triggering OBDII code P1111 on a 2017 GMC Sierra related to the Intake Air Temperature Sensor Circuit Intermittent High Voltage?
- Yes, extreme temperatures or driving in dusty or humid conditions can potentially impact the intake air temperature sensor's readings and lead to intermittent high voltage issues.
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