AutoCodes – Chevrolet – P0073 Chevrolet

P0073 Chevrolet 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 Chevrolet 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 3,318

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 Chevrolet 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 Chevrolet - Ambient Air Temperature Sensor Circuit High Voltage - AutoCodes.com — P0073 Chevrolet Code - Ambient Air Temperature Sensor Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0073 Chevrolet?

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 Chevrolet?

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 Chevrolet 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 Chevrolet code?

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

Need Help with the Code?

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Information for Specific Chevrolet Models

P0073 2014 Chevrolet Silverado — Ambient Air Temperature Sensor Circuit High Voltage
P0073 2015 Chevrolet Silverado — Ambient Air Temperature Sensor Circuit High Voltage
P0073 2016 Chevrolet Silverado — Ambient Air Temperature Sensor Circuit High Voltage
P0073 2017 Chevrolet Silverado — Ambient Air Temperature Sensor Circuit High Voltage
P0073 2018 Chevrolet Silverado — Ambient Air Temperature Sensor Circuit High Voltage

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 Chevrolet Code

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

- Common symptoms include inaccurate temperature readings on the dashboard, issues with the vehicle's climate control system, and potential impact on fuel efficiency.

2. What are the possible causes of the Ambient Air Temperature Sensor Circuit High Voltage code P0073 in a Chevrolet?

- Possible causes may include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or a malfunctioning engine control module (ECM).

3. How can I diagnose the cause of OBDII code P0073 in my Chevrolet related to the Ambient Air Temperature Sensor Circuit High Voltage?

- Diagnose the code by visually inspecting the sensor and its wiring, testing the sensor's resistance, checking for voltage supply, and using a scan tool to monitor sensor data.

4. Can driving with OBDII code P0073 Chevrolet Ambient Air Temperature Sensor Circuit High Voltage cause any further damage?

- Driving with this code may not directly damage the vehicle, but it can lead to inaccurate temperature readings and affect the performance of the climate control system.

5. What are the repair options for fixing OBDII code P0073 in a Chevrolet due to the Ambient Air Temperature Sensor Circuit High Voltage?

- Repair options include replacing the ambient air temperature sensor, repairing or replacing damaged wiring or connectors, and resetting the ECM after making necessary fixes.

6. How critical is it to address OBDII code P0073 Ambient Air Temperature Sensor Circuit High Voltage in a Chevrolet promptly?

- It is advisable to address this code promptly as it can impact the vehicle's performance, fuel efficiency, and overall driving comfort.

7. Are there any DIY tips for troubleshooting OBDII code P0073 related to the Ambient Air Temperature Sensor Circuit High Voltage in a Chevrolet?

- DIY tips include checking for loose connections, inspecting the sensor for physical damage, and ensuring proper grounding of the sensor circuit.

8. Can extreme weather conditions or environmental factors trigger OBDII code P0073 in a Chevrolet linked to the Ambient Air Temperature Sensor Circuit High Voltage?

- Yes, extreme heat or cold can affect the ambient air temperature sensor's performance and potentially trigger the code P0073 in a Chevrolet.

9. How can I prevent OBDII code P0073 Ambient Air Temperature Sensor Circuit High Voltage in my Chevrolet from recurring?

- To prevent recurrence, ensure proper installation of the ambient air temperature sensor, regularly inspect the sensor and its wiring, and address any underlying issues promptly.

10. Is it safe to continue driving my Chevrolet with OBDII code P0073 Ambient Air Temperature Sensor Circuit High Voltage without immediate repairs?

- While the vehicle may still be operable, driving with this code can lead to inaccurate temperature readings and affect the functionality of the climate control system, so prompt repairs are recommended.