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P0071 2017 GMC Sierra Code - Ambient Air Temperature Sensor Performance

Quick Answer

The P0071 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Ambient Air Temperature Sensor Performance. Common causes include Sensor Malfunction: The ambient air temperature sensor itself may be faulty or damaged, leading to inaccurate readings, Wiring Issues: Corrosion, fraying, or damage to the wiring connected to the sensor can cause communication errors, Environmental Factors: Exposure to extreme temperatures, moisture, or road debris can impact the sensor's performance. 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 2017 GMC Sierra indicates Ambient Air Temperature Sensor Performance.
Common causes
Common causes include Sensor Malfunction: The ambient air temperature sensor itself may be faulty or damaged, leading to inaccurate readings, Wiring Issues: Corrosion, fraying, or damage to the wiring connected to the sensor can cause communication errors, Environmental Factors: Exposure to extreme temperatures, moisture, or road debris can impact the sensor's performance.
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 16, 2024
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Code P0071 2017 GMC Sierra Description

The P0071 diagnostic trouble code (DTC) for a 2017 GMC Sierra relates to the Ambient Air Temperature Sensor Performance. This sensor is responsible for measuring the temperature of the air outside the vehicle. The information gathered by this sensor is crucial for the engine control module (ECM) to adjust various parameters such as air/fuel mixture, ignition timing, and emissions control. When the ECM detects that the ambient air temperature sensor is not performing within the expected parameters, it triggers the P0071 code.

OBDII Code P0071 2017 GMC Sierra - Ambient Air Temperature Sensor Performance
P0071 2017 GMC Sierra Code - Ambient Air Temperature Sensor Performance

Common Causes of P0071 2017 GMC Sierra

  1. Sensor Malfunction: The ambient air temperature sensor itself may be faulty or damaged, leading to inaccurate readings.
  2. Wiring Issues: Corrosion, fraying, or damage to the wiring connected to the sensor can cause communication errors.
  3. Environmental Factors: Exposure to extreme temperatures, moisture, or road debris can impact the sensor's performance.
  4. ECM Malfunction: In rare cases, a malfunction in the engine control module could also trigger the P0071 code.

Symptoms of P0071 2017 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P0071 code is the illumination of the check engine light on the dashboard.
  2. Inaccurate Temperature Readings: The vehicle may display incorrect ambient air temperature readings on the dashboard.
  3. Poor Fuel Efficiency: A faulty ambient air temperature sensor can lead to decreased fuel efficiency as the ECM may not be able to adjust the air/fuel mixture accurately.
  4. Rough Idling: The engine may experience rough idling or stalling due to incorrect temperature readings affecting the engine's performance.

How to Fix P0071 2017 GMC Sierra

  1. Diagnostic Testing: Begin by using a scan tool to retrieve the specific DTC and confirm the issue with the ambient air temperature sensor.
  2. Sensor Replacement: Locate the sensor (usually near the front bumper or radiator) and replace it with a new one. Ensure proper installation and connection.
  3. Wiring Inspection: Check the wiring harness for any damage, corrosion, or loose connections. Repair or replace as needed.
  4. Clearing DTC: After the repair is completed, clear the DTC from the ECM memory using the scan tool.
  5. Test Drive: Take the vehicle for a test drive to ensure that the check engine light does not reappear and that the sensor is providing accurate readings.

Cost to Fix P0071 2017 GMC Sierra

The cost estimate for resolving the P0071 code on a 2017 GMC Sierra can vary depending on the location, labor rates, and the price of parts. Typically, the replacement ambient air temperature sensor can range from $50 to $100, while the labor cost can be around $100 to $200. Overall, the total repair cost could be between $150 and $300. It's important to note that these are rough estimates, and actual costs may differ based on individual circumstances. It's recommended to consult with a professional mechanic for a more accurate assessment of the repair expenses. Labor rates at auto repair shops can vary between $80 and $150 per hour, so it's advisable to inquire about specific rates in your area.

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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 2017 GMC Sierra Code

1. What does the OBDII code P0071 mean on a 2017 GMC Sierra?

P0071 indicates an issue with the Ambient Air Temperature Sensor's performance, specifically that its readings are inconsistent or outside expected parameters.

2. What are the common symptoms of a P0071 code in a 2017 GMC Sierra?

Symptoms may include inaccurate external temperature readings on the dashboard, issues with HVAC performance, or the check engine light turning on.

3. What causes the P0071 code on a 2017 GMC Sierra?

Common causes include a faulty ambient air temperature sensor, damaged wiring or connectors, corrosion, or a malfunctioning control module.

4. Can a P0071 code affect my truck’s performance?

While it may not directly affect engine performance, it can impact HVAC functionality, such as automatic climate control, and may interfere with other systems relying on temperature input.

5. How do I diagnose a P0071 code on my GMC Sierra?

Start by inspecting the ambient air temperature sensor for physical damage or debris, check the wiring and connectors for damage or corrosion, and use a scan tool to monitor live data from the sensor.

6. Where is the ambient air temperature sensor located on a 2017 GMC Sierra?

The sensor is typically located near the front grille or bumper, exposed to external air for accurate temperature readings.

7. Can I drive my 2017 GMC Sierra with a P0071 code?

Yes, you can drive with this code, but you may experience inconvenience with climate control systems or inaccurate temperature readings.

8. How do I fix a P0071 code on my GMC Sierra?

Repairs may involve cleaning or replacing the ambient air temperature sensor, repairing damaged wiring, or updating the vehicle’s control module software if necessary.

9. How much does it cost to fix a P0071 code on a GMC Sierra?

Replacing the ambient air temperature sensor typically costs between $50 and $150, including parts and labor, though wiring repairs or additional diagnostics may increase the cost.

10. Can I reset the P0071 code without fixing the issue?

While you can clear the code with a scan tool, it will likely return unless the underlying issue is repaired.

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