AutoCodes – Ford – P0071 2017 Ford F150

P0071 2017 Ford F150 Code - Ambient Air Temperature Sensor Circuit 'A' Range/Performance

Quick Answer

The Ambient Air Temperature (AAT) Sensor is a thermistor device in which resistance changes with temperature. Common causes include Faulty Ambient Air Temperature (AAT) 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 2017 Ford F150 indicates Ambient Air Temperature Sensor Circuit 'A' Range/Performance.
Common causes: Common causes include Faulty Ambient Air Temperature (AAT) 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 304

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 08, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0071 2017 Ford F150 Description

The Ambient Air Temperature (AAT) Sensor is a thermistor device in which resistance changes with temperature. The resistance of a thermistor decreases as the temperature increases, and the resistance increases as the temperature decreases. The varying resistance affects the voltage drop across the sensor pins and provides electrical signals to the Powertrain Control Module (PCM) corresponding to temperature.
Thermistor type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so that varying the resistance of the passive sensor causes a variation in total current flow. Voltage that is dropped across a fixed resistor in series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The AAT sensor provides ambient air temperature information to the PCM for the temperature sensor correlation tests. The PCM also communicates the AAT sensor information to all other modules on the controller area network (CAN).
This Diagnostic Trouble Code (DTC) sets when the ambient air temperature (AAT) sensor reading does not correlate with the other temperature sensor readings at ignition ON. The PCM runs this logic after an engine off and a calibrated soak period, typically 6 to 8 hours. This soak period allows the AAT sensor and the other temperature sensors to stabilize and not differ by greater than a calibrated value, typically 18°C (32.4°F).

OBDII Code P0071 2017 Ford F150 - Ambient Air Temperature Sensor Circuit 'A' Range/Performance - AutoCodes.com — P0071 2017 Ford F150 Code - Ambient Air Temperature Sensor Circuit 'A' Range/Performance

What does this mean?

What are the Possible Causes of the DTC P0071 2017 Ford F150?

Faulty Ambient Air Temperature (AAT) Sensor
Ambient Air Temperature Sensor harness is open or shorted
Ambient Air Temperature Sensor circuit poor electrical connection

How to Fix the DTC P0071 2017 Ford F150?

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 2017 Ford F150 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 2017 Ford F150 code?

Need more information on how to fix the P0071 2017 Ford F150 code? Get Access to Factory Service Manuals

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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 Ford F150 Code

1. What are the common symptoms of OBDII code P0071 on a 2017 Ford F150?

The common symptoms of OBDII code P0071 on a 2017 Ford F150 include inaccurate temperature readings on the dashboard, poor fuel efficiency, and potential issues with the vehicle's climate control system.

2. What does the OBDII code P0071 for a 2017 Ford F150 indicate?

OBDII code P0071 for a 2017 Ford F150 indicates a fault with the Ambient Air Temperature Sensor Circuit 'A', specifically relating to range/performance issues.

3. What are the possible causes of OBDII code P0071 on a 2017 Ford F150?

Possible causes of OBDII code P0071 on a 2017 Ford F150 include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's signal to the engine control module.

4. How can I diagnose the Ambient Air Temperature Sensor Circuit 'A' issue on my 2017 Ford F150?

To diagnose the Ambient Air Temperature Sensor Circuit 'A' issue on a 2017 Ford F150, you can use an OBDII scanner to read the trouble codes, visually inspect the sensor and its wiring for any visible damage, and perform a continuity test to check for proper electrical connections.

5. Can I still drive my 2017 Ford F150 with OBDII code P0071?

While it may be possible to drive your 2017 Ford F150 with OBDII code P0071, it is not recommended as the issue can affect the vehicle's performance and fuel efficiency. It is best to address the problem promptly to prevent further damage.

6. How can I repair OBDII code P0071 on my 2017 Ford F150?

To repair OBDII code P0071 on a 2017 Ford F150, you may need to replace the ambient air temperature sensor, repair any damaged wiring or connectors, and clear the trouble codes using an OBDII scanner.

7. Is it possible to reset OBDII code P0071 on a 2017 Ford F150 without repairing the issue?

While you can clear the trouble codes and reset OBDII code P0071 on a 2017 Ford F150 without repairing the underlying issue, the problem is likely to reappear if the root cause is not addressed.

8. How much does it cost to fix OBDII code P0071 on a 2017 Ford F150?

The cost to fix OBDII code P0071 on a 2017 Ford F150 can vary depending on the exact cause of the issue, but it may involve expenses for parts such as the ambient air temperature sensor and labor costs for professional repair services.

9. Can a DIY enthusiast repair OBDII code P0071 on a 2017 Ford F150?

A DIY enthusiast with the necessary tools and knowledge of automotive systems may be able to repair OBDII code P0071 on a 2017 Ford F150 by following repair guides, but it is recommended to consult with a professional mechanic for accurate diagnosis and repair.

10. How important is the Ambient Air Temperature Sensor in a 2017 Ford F150?

The Ambient Air Temperature Sensor in a 2017 Ford F150 plays a crucial role in providing accurate temperature readings for the vehicle's systems, contributing to proper engine performance, fuel efficiency, and climate control functions. Addressing issues with this sensor promptly is important for overall vehicle health.