AutoCodes – Ford – P0073 2019 Ford F150

P0073 2019 Ford F150 Code - Ambient Air Temperature Sensor Circuit 'A' High

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: P0073 2019 Ford F150 indicates Ambient Air Temperature Sensor Circuit 'A' High.
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 1,023

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 P0073 2019 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 signal is greater than the self-test maximum.

OBDII Code P0073 2019 Ford F150 - Ambient Air Temperature Sensor Circuit 'A' High - AutoCodes.com — P0073 2019 Ford F150 Code - Ambient Air Temperature Sensor Circuit 'A' High

What does this mean?

What are the Possible Causes of the DTC P0073 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 P0073 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 P0073 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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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 P0073 2019 Ford F150 Code

1. What are the common symptoms of OBDII code P0073 in a 2019 Ford F150?

The common symptoms of code P0073 in a 2019 Ford F150 include inaccurate temperature readings on the dashboard, issues with the climate control system, and potential impact on the vehicle's fuel efficiency.

2. What does the OBDII code P0073 for Ambient Air Temperature Sensor Circuit 'A' High indicate?

Code P0073 in a 2019 Ford F150 signifies that the ambient air temperature sensor circuit 'A' is reading a high voltage signal, indicating a potential issue with the sensor or its circuit.

3. What are the possible causes of OBDII code P0073 in a 2019 Ford F150?

Common causes of code P0073 in a 2019 Ford F150 include a faulty ambient air temperature sensor, damaged sensor wiring, poor electrical connections, or issues with the sensor circuit.

4. How can I diagnose the OBDII code P0073 in my 2019 Ford F150?

Diagnosing code P0073 involves inspecting the ambient air temperature sensor and its wiring for any visible damage, checking the sensor's resistance values, and using a multimeter to test the sensor's voltage output.

5. Can I drive my 2019 Ford F150 with OBDII code P0073?

While it may be possible to drive with code P0073, it is not recommended as it can affect the accuracy of temperature readings and potentially impact other vehicle systems. It's advisable to address the issue promptly.

6. How can I repair OBDII code P0073 in my 2019 Ford F150?

To repair code P0073, you may need to replace the ambient air temperature sensor, repair any damaged wiring or connections, clear the trouble codes, and perform a thorough test drive to ensure the issue is resolved.

7. Will resetting the OBDII code P0073 in my 2019 Ford F150 make it go away permanently?

Resetting the code may clear it temporarily, but if the underlying issue causing code P0073 is not addressed, the code is likely to reappear. It's essential to diagnose and repair the root cause of the problem.

8. Can extreme weather conditions trigger OBDII code P0073 in a 2019 Ford F150?

Extreme heat or cold can potentially affect the performance of the ambient air temperature sensor, leading to false readings and triggering code P0073. Ensure the sensor is properly insulated and shielded from extreme conditions.

9. Is it possible to bypass the ambient air temperature sensor to avoid OBDII code P0073 in my 2019 Ford F150?

Bypassing the sensor is not recommended, as it plays a crucial role in various vehicle systems. It is best to address the root cause of the issue by repairing or replacing the sensor to ensure proper functionality.

10. How much does it cost to fix OBDII code P0073 in a 2019 Ford F150?

The cost of fixing code P0073 can vary depending on the cause of the issue, labor rates, and replacement part costs. It is advisable to consult a professional mechanic for an accurate diagnosis and repair estimate.