AutoCodes – GMC – P0073 2015 GMC Sierra

P0073 2015 GMC Sierra Code - Ambient Air Temperature Sensor Circuit High Voltage

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: P0073 2015 GMC Sierra indicates Ambient Air Temperature Sensor Circuit High Voltage.
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.

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Code Popularity 218

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
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Code P0073 2015 GMC Sierra 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 when the ECM detects the Ambient Air Temperature Sensor signal is less than -40°C (-40°F).

OBDII Code P0073 2015 GMC Sierra - Ambient Air Temperature Sensor Circuit High Voltage - AutoCodes.com — P0073 2015 GMC Sierra Code - Ambient Air Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0073 2015 GMC Sierra?

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 P0073 2015 GMC Sierra?

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 2015 GMC Sierra 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 P0073 2015 GMC Sierra code?

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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 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P0073 in a 2015 GMC Sierra related to the Ambient Air Temperature Sensor Circuit High Voltage?

- Common symptoms may include inaccurate temperature readings on the vehicle's display, poor fuel efficiency, and potential issues with the air conditioning system.

2. What are the possible causes of OBDII code P0073 in a 2015 GMC Sierra?

- The code P0073 can be triggered by a faulty ambient air temperature sensor, damaged wiring or connectors related to the sensor, or issues with the sensor's circuit.

3. How can I diagnose the Ambient Air Temperature Sensor Circuit High Voltage issue in my 2015 GMC Sierra?

- Diagnosing the problem involves checking the ambient air temperature sensor for any physical damage, testing the sensor's electrical connections, and inspecting the wiring for any signs of wear or corrosion.

4. Can I drive my 2015 GMC Sierra with OBDII code P0073 triggered?

- It is generally not recommended to drive with the code P0073 active, as it can lead to inaccurate readings and potential issues with the vehicle's performance. It is best to address the problem promptly.

5. How can I repair OBDII code P0073 in my 2015 GMC Sierra?

- Repairing the code P0073 involves replacing the ambient air temperature sensor if it is faulty, repairing or replacing damaged wiring or connectors, and clearing the error code with an OBDII scanner.

6. Is it possible to reset the OBDII code P0073 in a 2015 GMC Sierra without fixing the underlying issue?

- While you can clear the error code temporarily with an OBDII scanner, the code is likely to return if the root cause of the Ambient Air Temperature Sensor Circuit High Voltage problem is not addressed.

7. How much does it typically cost to repair OBDII code P0073 in a 2015 GMC Sierra?

- The cost of repairing the code P0073 can vary depending on the specific issue, but it may involve parts and labor expenses totaling a few hundred dollars at a dealership or repair shop.

8. Can extreme weather conditions affect the triggering of OBDII code P0073 in a 2015 GMC Sierra?

- Extreme temperatures can potentially impact the ambient air temperature sensor's performance and lead to the triggering of code P0073. It is essential to keep the sensor and its surroundings clean and well-maintained.

9. Will fixing OBDII code P0073 improve the overall performance of my 2015 GMC Sierra?

- Addressing the Ambient Air Temperature Sensor Circuit High Voltage issue indicated by code P0073 can help restore accurate temperature readings, improve fuel efficiency, and ensure proper operation of the vehicle's systems.

10. How often should the ambient air temperature sensor be inspected in a 2015 GMC Sierra to prevent OBDII code P0073 from recurring?

- It is advisable to include the ambient air temperature sensor in regular vehicle maintenance checks to detect any potential issues early and prevent the reoccurrence of code P0073.