AutoCodes – GMC – P0071 2014 GMC Sierra

P0071 2014 GMC Sierra Code - Ambient Air Temperature Sensor Performance

Quick Answer

The Engine Control Module (ECM) monitors the ambient air temperature sensor with a low reference circuit and signal circuit. Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient 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: P0071 2014 GMC Sierra indicates Ambient Air Temperature Sensor Performance.
Common causes: Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient 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.

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Code Popularity 209

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0071 2014 GMC Sierra Description

The Engine Control Module (ECM) monitors the ambient air temperature sensor with a low reference circuit and signal circuit. The ECM monitors the voltage drop across the sensor, which is inversely proportional to temperature. When the ambient air temperature is cold, the resistance of the sensor is high. When the ambient air temperature is warm, the resistance of the sensors is low. The engine control module converts the voltage value to a temperature value and sends the value to the Display Module via serial data. The Display Module displays the temperature. The Diagnostic Trouble Code (DTC) will be set if the ECM detects that during the first 20s of run time after the 1 hour soaking period, the difference between the outside air temperature and the engine intake air temperature is greater than 30°C (86°F).

OBDII Code P0071 2014 GMC Sierra - Ambient Air Temperature Sensor Performance - AutoCodes.com — P0071 2014 GMC Sierra Code - Ambient Air Temperature Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P0071 2014 GMC Sierra?

Faulty Ambient Air Temperature Sensor
Ambient Air Temperature Sensor harness is open or shorted
Ambient Air Temperature Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0071 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 P0071 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.

Need more information about the P0071 2014 GMC Sierra code?

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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 P0071 2014 GMC Sierra Code

1. What are common symptoms of OBDII code P0071 in a 2014 GMC Sierra related to the Ambient Air Temperature Sensor?

The common symptoms include incorrect temperature readings on the dashboard display, fluctuations in temperature readings, and potential issues with the vehicle's air conditioning system.

2. What are the possible causes of OBDII code P0071 in a 2014 GMC Sierra related to the Ambient Air Temperature Sensor?

The code P0071 is typically triggered by a faulty or malfunctioning Ambient Air Temperature (AAT) sensor, damaged wiring or connectors leading to the sensor, or issues with the sensor's placement or mounting.

3. How can I diagnose the cause of OBDII code P0071 in my 2014 GMC Sierra related to the Ambient Air Temperature Sensor?

Diagnosing the issue involves visually inspecting the sensor and its wiring for any signs of damage, using a multimeter to test the sensor's resistance, and checking for any loose or disconnected connections.

4. Can I drive my 2014 GMC Sierra with OBDII code P0071 related to the Ambient Air Temperature Sensor?

While the vehicle may still be drivable with this code, it is recommended to address the issue promptly to prevent further complications with the vehicle's systems that rely on accurate temperature readings.

5. How do I repair OBDII code P0071 in my 2014 GMC Sierra related to the Ambient Air Temperature Sensor?

Repairing the code may involve replacing the faulty Ambient Air Temperature sensor, repairing or replacing damaged wiring or connectors, and ensuring the sensor is correctly mounted and positioned.

6. Will resetting the OBDII code P0071 in my 2014 GMC Sierra related to the Ambient Air Temperature Sensor make it go away permanently?

Simply resetting the code without addressing the underlying issue will not make it go away permanently. It is essential to diagnose and repair the root cause of the problem to prevent the code from reappearing.

7. Can extreme weather conditions affect the performance of the Ambient Air Temperature sensor in a 2014 GMC Sierra and trigger OBDII code P0071?

Yes, extreme heat or cold can potentially impact the performance of the Ambient Air Temperature sensor, leading to inaccurate readings and triggering the OBDII code P0071.

8. Is it possible for a dirty or obstructed Ambient Air Temperature sensor to trigger OBDII code P0071 in a 2014 GMC Sierra?

Yes, a dirty or obstructed sensor may provide incorrect temperature readings, causing the vehicle's computer to trigger the OBDII code P0071 due to the sensor's performance being compromised.

9. What steps should I take if I suspect the Ambient Air Temperature sensor is causing OBDII code P0071 in my 2014 GMC Sierra?

Begin by visually inspecting the sensor and its surroundings for any visible issues, then proceed to test the sensor's functionality using a multimeter and checking the wiring and connections for any faults.

10. Are there any recalls or technical service bulletins related to OBDII code P0071 in a 2014 GMC Sierra's Ambient Air Temperature sensor?

It's advisable to check with a GMC dealership or visit the manufacturer's website to inquire about any recalls or technical service bulletins related to the specific issue of OBDII code P0071 and the Ambient Air Temperature sensor in a 2014 GMC Sierra.