AutoCodes – GMC – P0073 2014 GMC Sierra

P0073 2014 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 2014 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 252

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 2014 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 2014 GMC Sierra - Ambient Air Temperature Sensor Circuit High Voltage - AutoCodes.com — P0073 2014 GMC Sierra Code - Ambient Air Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0073 2014 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 2014 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 2014 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 2014 GMC Sierra code?

Need more information on how to fix the P0073 2014 GMC Sierra code? Get Access to Factory Service Manuals

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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 2014 GMC Sierra Code

What does OBDII code P0073 mean for a 2014 GMC Sierra?

OBDII code P0073 indicates that the ambient air temperature sensor circuit is experiencing high voltage, which can affect the vehicle's engine performance and efficiency.

What are the common symptoms of the P0073 code?

Common symptoms include incorrect temperature readings on the dashboard, poor fuel economy, and potential issues with the air conditioning system.

What could cause the P0073 code to trigger?

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

How can I diagnose the P0073 code?

To diagnose P0073, check the ambient air temperature sensor for proper function, inspect the wiring and connectors for damage, and use a multimeter to test for voltage and continuity in the circuit.

What are some repair tips for fixing the P0073 code?

Repair tips include replacing the faulty ambient air temperature sensor, repairing or replacing any damaged wiring or connectors, and ensuring all electrical connections are clean and secure.

Can I drive my 2014 GMC Sierra with the P0073 code?

While it may be possible to drive with the P0073 code, it is advisable to address the issue promptly to avoid potential performance problems and decreased fuel efficiency.

Will clearing the P0073 code fix the problem?

Clearing the code may temporarily turn off the check engine light, but the underlying issue will still need to be repaired for the code not to reappear.

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

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

Is the P0073 code serious?

Yes, the P0073 code can be serious as it may affect the engine's performance and fuel efficiency, so it's important to diagnose and repair it as soon as possible.

Can I replace the ambient air temperature sensor myself?

Yes, if you have basic automotive repair skills, you can replace the ambient air temperature sensor yourself, but make sure to follow safety guidelines and consult your vehicle's service manual for specific instructions.