AutoCodes – Chevrolet – B0173 Chevrolet

B0173 Chevrolet Code - Output Air Temperature Sensor 1 Circuit

Quick Answer

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the discharge air in the HVAC ducts. Common causes include Faulty Output Air Temperature Sensor 1, Output Air Temperature Sensor 1 harness is open or shorted, Output Air Temperature Sensor 1 circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0173 Chevrolet indicates Output Air Temperature Sensor 1 Circuit.
Common causes: Common causes include Faulty Output Air Temperature Sensor 1, Output Air Temperature Sensor 1 harness is open or shorted, Output Air Temperature Sensor 1 circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 6,064

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 10, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0173 Chevrolet Description

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the temperature of the discharge air in the HVAC ducts. The module applies 5 volts to internal input resistors that are connected to the signal circuits of the air temperature sensors. The module provides ground to the air temperature sensors through the low reference circuit. The HVAC control module monitors the voltage drops across the air temperature sensors and uses the inputs for automatic control calculations. When the duct air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the duct air temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The HVAC control module converts the voltage values to count values where 1 volt is approximately equal to 51 counts.

OBDII Code B0173 Chevrolet - Output Air Temperature Sensor 1 Circuit - AutoCodes.com — B0173 Chevrolet Code - Output Air Temperature Sensor 1 Circuit

What does this mean?

What are the Possible Causes of the DTC B0173 Chevrolet?

Faulty Output Air Temperature Sensor 1
Output Air Temperature Sensor 1 harness is open or shorted
Output Air Temperature Sensor 1 circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0173 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 does this mean?

Code Tech Notes

B0173 05: Output Air Temperature Sensor 1 Circuit Short to Battery or Open
B0173 02: Output Air Temperature Sensor 1 Circuit Short to Ground

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0173 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.

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Need more information on how to fix the B0173 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0173 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 B0173 Chevrolet Code

1. What are common symptoms of OBDII code B0173 in a Chevrolet related to the Output Air Temperature Sensor 1 Circuit?

Common symptoms include poor engine performance, reduced fuel efficiency, and potential issues with the vehicle's air conditioning system.

2. What are some possible causes of OBDII code B0173 in a Chevrolet?

Potential causes include a faulty output air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's placement or connection.

3. How can I diagnose the OBDII code B0173 in my Chevrolet?

Diagnosing this code typically involves using a scan tool to retrieve the specific fault code, checking the wiring and connectors related to the output air temperature sensor, and testing the sensor itself for proper function.

4. Can I drive my Chevrolet with OBDII code B0173 present?

It is not recommended to drive your vehicle with this code present, as it can lead to further damage to the engine or other components. It is best to address the issue promptly.

5. How can I repair OBDII code B0173 in my Chevrolet?

Repairing this code may involve replacing the output air temperature sensor, repairing any damaged wiring or connectors, or repositioning the sensor to ensure proper connection and function.

6. Will resetting the OBDII code B0173 in my Chevrolet make it go away permanently?

Simply resetting the code may temporarily clear the warning light, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem.

7. Can a DIY enthusiast fix OBDII code B0173 in a Chevrolet?

Depending on your skill level and access to tools, it may be possible to address this code yourself. However, if you are unsure about the diagnosis or repair process, it is recommended to seek professional help.

8. Is OBDII code B0173 in a Chevrolet a serious issue?

While not a critical issue that will leave you stranded, ignoring this code can lead to decreased performance and potential long-term damage to your vehicle. It is best to address it in a timely manner.

9. How long does it typically take to repair OBDII code B0173 in a Chevrolet?

The repair time can vary depending on the exact cause of the code and the availability of parts. In general, it may take anywhere from 30 minutes to a few hours to complete the repair.

10. Are there any preventive measures to avoid OBDII code B0173 in a Chevrolet?

Regular maintenance, such as checking and cleaning sensor connections, inspecting wiring for damage, and addressing any issues promptly, can help prevent the occurrence of this code in your Chevrolet.