P0071 2019 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 2019 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.
Code P0071 2019 Ford F150 Description
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).
What are the Possible Causes of the DTC P0071 2019 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 2019 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 2019 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.
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Frequently Asked Questions about P0071 2019 Ford F150 Code
1. What are the common symptoms of OBDII code P0071 on a 2019 Ford F150?
The common symptoms of code P0071 include incorrect ambient temperature readings on the dashboard, issues with the climate control system, and potential effects on the vehicle's fuel efficiency.
2. What does the Ambient Air Temperature Sensor Circuit 'A' Range/Performance error code P0071 indicate on a 2019 Ford F150?
The P0071 code indicates a problem with the ambient air temperature sensor circuit in the vehicle, specifically in terms of a range/performance issue.
3. What are the possible causes of OBDII code P0071 on a 2019 Ford F150?
Possible causes of code P0071 can include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's placement or calibration.
4. How can I diagnose the Ambient Air Temperature Sensor Circuit 'A' Range/Performance code P0071 on my 2019 Ford F150?
Diagnosing code P0071 typically involves checking the ambient air temperature sensor for proper operation, inspecting the sensor circuit for any damage, and using a scan tool to gather data on sensor readings.
5. Can a faulty ambient air temperature sensor cause other issues besides triggering code P0071 on a 2019 Ford F150?
Yes, a faulty ambient air temperature sensor can cause issues beyond triggering code P0071, such as impacting the vehicle's climate control system, leading to inaccurate temperature readings, and affecting the engine's performance.
6. How can I repair OBDII code P0071 on my 2019 Ford F150?
To repair code P0071, you may need to replace the ambient air temperature sensor if it is found to be faulty, repair any damaged wiring or connectors in the sensor circuit, and ensure proper calibration and placement of the sensor.
7. Is it safe to continue driving my 2019 Ford F150 with OBDII code P0071 present?
While the vehicle may still be operable with code P0071, it is recommended to address the issue promptly to prevent any potential adverse effects on the vehicle's performance, fuel efficiency, and climate control system.
8. Can extreme weather conditions affect the ambient air temperature sensor and trigger code P0071 on a 2019 Ford F150?
Yes, extreme weather conditions such as extreme heat or cold can potentially affect the ambient air temperature sensor's performance and trigger code P0071 due to the sensor being exposed to harsh environmental factors.
9. Are there any DIY tips for troubleshooting code P0071 on a 2019 Ford F150?
DIY troubleshooting tips for code P0071 can include visually inspecting the sensor and its wiring for any obvious signs of damage, checking the sensor's connection, and ensuring the sensor is free from any obstructions.
10. Should I reset the OBDII code P0071 on my 2019 Ford F150 after making repairs?
After making necessary repairs to address code P0071, it is advisable to reset the code using an OBDII scanner to clear the error code from the vehicle's system and see if the issue has been successfully resolved.
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