AutoCodes – GMC – P0073 2017 GMC Sierra

P0073 2017 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 2017 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 309

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 2017 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 2017 GMC Sierra - Ambient Air Temperature Sensor Circuit High Voltage - AutoCodes.com — P0073 2017 GMC Sierra Code - Ambient Air Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0073 2017 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 2017 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 2017 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 2017 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 2017 GMC Sierra Code

What does the OBDII code P0073 indicate in a 2017 GMC Sierra?

P0073 indicates that there is a high voltage signal coming from the ambient air temperature sensor circuit, suggesting a potential issue with the sensor or its wiring.

What are the common symptoms of a P0073 code?

Common symptoms include inaccurate temperature readings on the dashboard, potential issues with climate control, and the check engine light being illuminated.

What could cause the P0073 code to trigger?

Causes may include a faulty ambient air temperature sensor, damaged wiring or connectors, or short circuits in the sensor circuit.

How can I diagnose a P0073 code?

To diagnose a P0073 code, check the ambient air temperature sensor with a multimeter, inspect the wiring and connectors for damage, and ensure there are no shorts or open circuits.

What repairs are typically needed for a P0073 code?

Repairs may include replacing the faulty ambient air temperature sensor, repairing or replacing damaged wiring, or addressing any related electrical issues.

Can a P0073 code affect vehicle performance?

While it may not significantly affect vehicle performance, it can lead to incorrect climate control functioning and potentially impact fuel economy due to incorrect temperature readings.

Is it safe to drive with a P0073 code?

It is generally safe to drive with a P0073 code, but it is advisable to address the issue to ensure proper vehicle operation and comfort.

How much does it typically cost to fix a P0073 code?

Repair costs can vary widely depending on whether the ambient air temperature sensor needs replacement or if there are wiring issues, but it typically ranges from $100 to $300.

Will clearing the P0073 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but if the underlying issue is not resolved, the code will likely return.