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Engine-Codes – GMC – B0173 GMC

B0173 GMC Code - Output Air Temperature Sensor 1 Circuit

Quick Answer

The B0173 GMC code refers to a problem with the Output Air Temperature Sensor 1 Circuit in the vehicle. Common causes include Faulty Output Air Temperature Sensor, Wiring or connection issues with the sensor, Corrosion or damage to sensor components. 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 GMC indicates Output Air Temperature Sensor 1 Circuit.
Common causes
Common causes include Faulty Output Air Temperature Sensor, Wiring or connection issues with the sensor, Corrosion or damage to sensor components.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 06, 2024
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Code B0173 GMC Description

The B0173 GMC code refers to a problem with the Output Air Temperature Sensor 1 Circuit in the vehicle. This sensor is responsible for measuring the temperature of the air exiting the HVAC system and sending this information to the vehicle's computer for proper climate control. When this sensor malfunctions or fails, it can lead to issues with the vehicle's heating, ventilation, and air conditioning systems.

OBDII Code B0173 GMC - Output Air Temperature Sensor 1 Circuit
B0173 GMC Code - Output Air Temperature Sensor 1 Circuit

Common Causes of B0173 GMC

  1. Faulty Output Air Temperature Sensor
  2. Wiring or connection issues with the sensor
  3. Corrosion or damage to sensor components
  4. Electrical problems within the HVAC system
  5. Software or programming issues with the vehicle's computer

Symptoms of B0173 GMC

  1. Incorrect temperature readings on the climate control system
  2. Inconsistent heating or cooling performance
  3. HVAC system blowing hot or cold air unexpectedly
  4. Climate control system not responding to temperature adjustments
  5. HVAC system shutting off intermittently

How to Fix B0173 GMC

  1. Begin by diagnosing the issue using a diagnostic scanner to retrieve the specific error code
  2. Inspect the Output Air Temperature Sensor and its wiring for any signs of damage or corrosion
  3. Test the sensor's functionality using a multimeter to ensure it is sending accurate temperature readings
  4. Replace the faulty sensor if necessary, ensuring proper installation and connection
  5. Clear the error code from the vehicle's computer and test the HVAC system to verify the repair

Cost to Fix B0173 GMC

The typical repair costs for addressing the B0173 GMC code can range from $150 to $300, including parts and labor. However, it's essential to note that the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less. It's advisable to check local rates for a more precise estimate.

What does this mean?

Tech Notes for B0173 GMC

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

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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 B0173 GMC Code

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

- Common symptoms include poor engine performance, reduced fuel efficiency, and the illumination of the Check Engine Light.

2. What are the possible causes of OBDII code B0173 GMC?

- Possible causes include a faulty output air temperature sensor, wiring issues, a damaged connector, or a problem within the engine control module.

3. How can I diagnose the cause of OBDII code B0173 GMC?

- Diagnosing this code typically involves using a scan tool to retrieve and interpret the code, checking the sensor and related wiring for damage, and testing the sensor's resistance.

4. Can I continue driving my vehicle with OBDII code B0173 GMC active?

- While the vehicle may still be operable with this code, it is not recommended to ignore it, as it can lead to further damage and poor engine performance if left unresolved.

5. How can I repair OBDII code B0173 GMC related to the Output Air Temperature Sensor 1 Circuit?

- Repairing this code usually involves replacing the faulty output air temperature sensor, repairing any damaged wiring or connectors, and clearing the code with a scan tool.

6. Are there any DIY tips for fixing OBDII code B0173 GMC?

- DIY enthusiasts can attempt to replace the output air temperature sensor themselves by following a repair manual specific to their vehicle make and model.

7. Is it necessary to reset the Check Engine Light after fixing OBDII code B0173 GMC?

- Yes, it is recommended to use a scan tool to clear the code and reset the Check Engine Light after repairing the issue to ensure proper functionality.

8. How long does it typically take to repair OBDII code B0173 GMC?

- The repair time can vary depending on the exact cause of the code and the level of expertise of the person performing the repair, but it can usually be completed within a few hours.

9. Can extreme weather conditions affect the output air temperature sensor and trigger OBDII code B0173 GMC?

- Yes, extreme temperatures can potentially impact the sensor's performance and lead to the triggering of this code, especially if the sensor is exposed to harsh conditions.

10. Will fixing OBDII code B0173 GMC improve my vehicle's performance and fuel efficiency?

- Yes, resolving this code and ensuring proper functioning of the output air temperature sensor can help restore optimal engine performance and fuel efficiency.

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