AutoCodes – Chevrolet – P0071 2018 Chevrolet Silverado

P0071 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 428

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0071 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado - Ambient Air Temperature Sensor Performance - AutoCodes.com — P0071 2018 Chevrolet Silverado Code - Ambient Air Temperature Sensor Performance

What does this mean?

What are the Possible Causes of the DTC P0071 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado?

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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado code?

Need more information on how to fix the P0071 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0071 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area

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 2018 Chevrolet Silverado Code

1. What does OBDII code P0071 on a 2018 Chevrolet Silverado mean?

The code P0071 indicates a performance issue with the Ambient Air Temperature Sensor in the vehicle.

2. What are the common symptoms of a faulty Ambient Air Temperature Sensor?

Common symptoms include inaccurate temperature readings on the dashboard display, incorrect climate control operation, and potential impact on fuel efficiency.

3. What are the possible causes of OBDII code P0071 in a 2018 Chevrolet Silverado?

Possible causes include a faulty Ambient Air Temperature Sensor, wiring issues, sensor connection problems, or issues with the sensor circuit.

4. How can I diagnose the Ambient Air Temperature Sensor issue in my 2018 Chevrolet Silverado?

Diagnosing the problem involves using an OBDII scanner to retrieve the specific trouble code (P0071) and then testing the sensor's resistance and voltage output to determine if it is functioning correctly.

5. Can I still drive my Chevrolet Silverado with the P0071 code present?

It is generally safe to drive the vehicle with the P0071 code, but it is recommended to address the issue promptly to prevent potential impacts on fuel efficiency and climate control.

6. How can I repair a P0071 fault code in my Chevrolet Silverado?

Repair options include replacing the Ambient Air Temperature Sensor, checking and repairing any wiring or connection issues, or resetting the fault code after ensuring proper sensor function.

7. Is it possible to reset the P0071 code on a 2018 Chevrolet Silverado without fixing the underlying issue?

While you can clear the fault code with an OBDII scanner, it is crucial to address the root cause of the problem to prevent the code from reappearing.

8. How much does it typically cost to repair a P0071 fault in a Chevrolet Silverado?

The cost of repairing a P0071 fault can vary depending on the specific issue, but it generally ranges from $100 to $300 for parts and labor.

9. Will a faulty Ambient Air Temperature Sensor affect my Chevrolet Silverado's performance?

While a faulty sensor may not directly impact the vehicle's performance, it can lead to inaccurate temperature readings and affect the operation of the climate control system.

10. Can a DIY enthusiast replace the Ambient Air Temperature Sensor in a 2018 Chevrolet Silverado?

Replacing the Ambient Air Temperature Sensor is a relatively straightforward task that can be done by a DIY enthusiast with basic automotive knowledge and the right tools.