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P0072 2016 GMC Sierra Code - Ambient Air Temperature Sensor Circuit Low Voltage

Quick Answer

The P0072 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Ambient Air Temperature (AAT) sensor circuit registering low voltage. Common causes include Faulty Ambient Air Temperature (AAT) sensor, Damaged wiring or connectors in the AAT sensor circuit, Corrosion or contamination affecting sensor operation. 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
P0072 2016 GMC Sierra indicates Ambient Air Temperature Sensor Circuit Low Voltage.
Common causes
Common causes include Faulty Ambient Air Temperature (AAT) sensor, Damaged wiring or connectors in the AAT sensor circuit, Corrosion or contamination affecting sensor operation.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 14, 2024
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Code P0072 2016 GMC Sierra Description

The P0072 diagnostic trouble code (DTC) for a 2016 GMC Sierra refers to an issue with the Ambient Air Temperature (AAT) sensor circuit registering low voltage. The AAT sensor is responsible for measuring the temperature of the air surrounding the vehicle, providing crucial data for the engine control module (ECM) to adjust fuel delivery and ignition timing. When the voltage from the AAT sensor is lower than expected, it can lead to incorrect fuel and ignition settings, potentially affecting the vehicle's performance and efficiency.

OBDII Code P0072 2016 GMC Sierra - Ambient Air Temperature Sensor Circuit Low Voltage
P0072 2016 GMC Sierra Code - Ambient Air Temperature Sensor Circuit Low Voltage

Common Causes of P0072 2016 GMC Sierra

  1. Faulty Ambient Air Temperature (AAT) sensor.
  2. Damaged wiring or connectors in the AAT sensor circuit.
  3. Corrosion or contamination affecting sensor operation.
  4. ECM software or hardware issues.
  5. Environmental factors such as extreme temperatures affecting sensor performance.

Symptoms of P0072 2016 GMC Sierra

  1. Check engine light illuminated on the dashboard.
  2. Inaccurate temperature readings displayed on the vehicle's information display.
  3. Reduced fuel efficiency and engine performance.
  4. Engine running rough or stalling intermittently.
  5. Failsafe mode activated by the ECM, limiting power output.

How to Fix P0072 2016 GMC Sierra

  1. Begin by connecting a diagnostic scanner to the vehicle's OBD-II port to retrieve the specific trouble code (P0072) and confirm the issue with the AAT sensor.
  2. Inspect the AAT sensor, wiring, and connectors for any visible damage, corrosion, or contamination. Replace any components that show signs of wear.
  3. Test the AAT sensor's resistance and voltage output using a multimeter to ensure it is functioning within the manufacturer's specifications.
  4. Clear the trouble code from the ECM's memory using the diagnostic scanner and perform a test drive to verify that the issue has been resolved.
  5. If the problem persists, further diagnosis may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0072 2016 GMC Sierra

The cost of repairing a P0072 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, replacing a faulty Ambient Air Temperature (AAT) sensor can range from $50 to $150, while addressing wiring or connector issues may add to the total cost. Labor rates at auto repair shops typically range from $80 to $150 per hour, with additional charges for diagnostic time and parts. It is advisable to consult with a qualified mechanic or dealership for a more accurate estimate based on your location and vehicle's specific requirements.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0072 2016 GMC Sierra Code

1. What are the common symptoms of OBDII code P0072 in a 2016 GMC Sierra?

- Common symptoms include inaccurate temperature readings on the dashboard, issues with the climate control system, and potential impact on the vehicle's engine performance.

2. What causes the Ambient Air Temperature Sensor Circuit Low Voltage error (P0072) in a 2016 GMC Sierra?

- The P0072 code is typically triggered by a faulty ambient air temperature sensor, damaged wiring or connectors, or a malfunctioning engine control module (ECM).

3. How does a malfunctioning ambient air temperature sensor affect the vehicle?

- A faulty ambient air temperature sensor can lead to poor fuel efficiency, incorrect climate control system operation, and potential engine performance issues due to incorrect temperature readings.

4. Can I drive my 2016 GMC Sierra with OBDII code P0072?

- It is generally safe to drive the vehicle with the P0072 code, but it is recommended to address the issue promptly to prevent potential performance and efficiency issues.

5. How can I diagnose and repair the Ambient Air Temperature Sensor Circuit Low Voltage error in my 2016 GMC Sierra?

- Diagnosing and repairing the P0072 code involves checking the sensor's wiring and connectors for damage, testing the sensor's functionality, and possibly replacing the sensor if necessary.

6. Will resetting the OBDII code P0072 in my 2016 GMC Sierra make the issue go away?

- Resetting the code may temporarily clear the error, but if the underlying issue causing the P0072 code is not addressed, it is likely to reoccur.

7. Is the Ambient Air Temperature Sensor Circuit Low Voltage error (P0072) a serious issue in a 2016 GMC Sierra?

- While the P0072 code may not cause immediate harm to the vehicle, it can impact fuel efficiency, climate control system operation, and overall engine performance if left unresolved.

8. Can extreme weather conditions trigger the OBDII code P0072 in a 2016 GMC Sierra?

- Yes, extreme temperatures or exposure to moisture can sometimes cause the ambient air temperature sensor to malfunction, leading to the P0072 error code.

9. How much does it typically cost to repair the Ambient Air Temperature Sensor Circuit Low Voltage error in a 2016 GMC Sierra?

- The cost of repairing the P0072 code can vary depending on the underlying cause, but it may involve expenses for parts replacement and labor, ranging from $100 to $300 or more.

10. Can I fix the Ambient Air Temperature Sensor Circuit Low Voltage error (P0072) in my 2016 GMC Sierra myself?

- While some experienced DIYers may be able to diagnose and replace the ambient air temperature sensor themselves, it is recommended to consult a professional mechanic for accurate diagnosis and repair to ensure the issue is resolved correctly.

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