AutoCodes – Buick – B0174 Buick

B0174 Buick Code - Output Air Temperature Sensor 1 Circuit Range/Performance

Quick Answer

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the discharge duct air, outside air and inside air temperatures. 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: B0174 Buick indicates Output Air Temperature Sensor 1 Circuit Range/Performance.
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 1,078

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
Cost to Diagnose
FAQs
Comments
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Code B0174 Buick Description

Air temperature sensors allow the Heating, Ventilation, and Air Conditioning (HVAC) Control Module to monitor the discharge duct air, outside air and inside air temperatures. The HVAC control module provides ground to the air temperature sensor through the low reference circuit. The HVAC control module monitors the voltage drop across the air temperature sensor thermistor by supplying a 5 volt reference to the signal circuit of the air temperature sensor for automatic control calculations. When the air temperatures are cold, the resistances of the sensors are high and the voltage signals are high. When the air temperatures are hot, the resistances of the sensors are low and the voltage signals are low. The HVAC control module can read voltage values and count values where 1 volt is approximately equal to 51 counts.

OBDII Code B0174 Buick - Output Air Temperature Sensor 1 Circuit Range/Performance - AutoCodes.com — B0174 Buick Code - Output Air Temperature Sensor 1 Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC B0174 Buick?

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 B0174 Buick?

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 B0174 Buick 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 Help with the 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 B0174 Buick Code

1. What are the common symptoms of OBDII code B0174 in a Buick related to the Output Air Temperature Sensor 1 Circuit Range/Performance issue?

- Common symptoms include poor engine performance, reduced fuel efficiency, and an illuminated check engine light.

2. What are some possible causes of the B0174 OBDII code in a Buick?

- Possible causes include a faulty output air temperature sensor, wiring issues, vacuum leaks, or a problem with the engine control module.

3. How can I diagnose the Output Air Temperature Sensor 1 Circuit Range/Performance issue in my Buick?

- Diagnosis typically involves using an OBDII scanner to retrieve the specific trouble code, inspecting the sensor and its wiring for damage, and testing the sensor's resistance.

4. Can I continue driving my Buick with the B0174 code present?

- It is not recommended to continue driving with the B0174 code, as it can lead to further damage to the engine and potentially cause other issues.

5. How can I repair the Output Air Temperature Sensor 1 Circuit Range/Performance problem in my Buick?

- Repairing the issue may involve replacing the output air temperature sensor, repairing any damaged wiring, or addressing any vacuum leaks in the system.

6. Will resetting the check engine light make the B0174 code go away permanently?

- Resetting the check engine light may temporarily clear the code, but if the underlying issue is not addressed, the code is likely to return.

7. Is it possible to drive my Buick with a faulty output air temperature sensor?

- While it may be possible to drive the vehicle with a faulty sensor, it is not recommended as it can lead to poor engine performance and reduced fuel efficiency.

8. How much does it typically cost to repair the Output Air Temperature Sensor 1 Circuit Range/Performance issue in a Buick?

- The cost of repair can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.

9. Can a DIY enthusiast replace the output air temperature sensor in a Buick to address the B0174 code?

- Yes, replacing the output air temperature sensor can be a DIY project for those with the necessary tools and experience working on automotive systems.

10. How can regular maintenance help prevent the B0174 OBDII code from appearing in my Buick?

- Regular maintenance, such as checking and replacing sensors as needed, inspecting wiring for damage, and addressing vacuum leaks promptly, can help prevent the B0174 code from appearing in your Buick.