AutoCodes – GMC – P0073 2016 GMC Sierra

P0073 2016 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 2016 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 228

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 2016 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 2016 GMC Sierra - Ambient Air Temperature Sensor Circuit High Voltage - AutoCodes.com — P0073 2016 GMC Sierra Code - Ambient Air Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0073 2016 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 2016 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 2016 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 2016 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 2016 GMC Sierra Code

What does the OBDII code P0073 mean for a 2016 GMC Sierra?

P0073 indicates that the ambient air temperature sensor circuit is experiencing high voltage, which means the sensor or its circuit is malfunctioning.

What are the common symptoms of the P0073 code?

Common symptoms include inaccurate temperature readings, poor fuel economy, engine performance issues, and the check engine light being illuminated.

What could cause the P0073 code to trigger in a GMC Sierra?

Potential causes include a faulty ambient air temperature sensor, damaged wiring or connectors, short circuits, or issues with the Engine Control Module (ECM).

How can I diagnose the P0073 code?

Start by visually inspecting the ambient air temperature sensor and its wiring for damage. Use a multimeter to test the sensor's resistance and check for any voltage irregularities in the circuit.

Is it safe to drive with the P0073 code?

While it may not pose an immediate safety risk, driving with this code can lead to poor engine performance and decreased fuel efficiency, so it is advisable to address the issue promptly.

What repairs are commonly needed to fix the P0073 code?

Repairs may involve replacing the ambient air temperature sensor, fixing damaged wiring or connectors, or reprogramming or replacing the ECM if it is found to be faulty.

Can I clear the P0073 code, and will it come back?

You can clear the code using an OBDII scanner, but if the underlying issue is not resolved, the code will likely reappear.

How much does it typically cost to repair the P0073 code?

Repair costs can vary widely, but replacing the ambient air temperature sensor usually ranges from $100 to $300, depending on labor costs and parts prices.

Will the P0073 code affect my vehicleâ€™s emissions?

Yes, a malfunctioning ambient air temperature sensor can affect fuel mixture and combustion efficiency, potentially leading to increased emissions.