AutoCodes – Cadillac – B0179 Cadillac

B0179 Cadillac Code - Output Air Temperature Sensor 2 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 2, Output Air Temperature Sensor 2 harness is open or shorted, Output Air Temperature Sensor 2 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: B0179 Cadillac indicates Output Air Temperature Sensor 2 Circuit Range/Performance.
Common causes: Common causes include Faulty Output Air Temperature Sensor 2, Output Air Temperature Sensor 2 harness is open or shorted, Output Air Temperature Sensor 2 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 1,222

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 B0179 Cadillac 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 B0179 Cadillac - Output Air Temperature Sensor 2 Circuit Range/Performance - AutoCodes.com — B0179 Cadillac Code - Output Air Temperature Sensor 2 Circuit Range/Performance

What does this mean?

What are the Possible Causes of the DTC B0179 Cadillac?

Faulty Output Air Temperature Sensor 2
Output Air Temperature Sensor 2 harness is open or shorted
Output Air Temperature Sensor 2 circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0179 Cadillac?

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 B0179 Cadillac 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 B0179 Cadillac Code

1. What are common symptoms of OBDII code B0179 in a Cadillac?

- Common symptoms include poor fuel efficiency, rough idling, and potential issues with the vehicle's heating or cooling systems.

2. What can cause the OBDII code B0179 in a Cadillac?

- The code B0179 typically indicates a problem with the output air temperature sensor 2, which may be caused by a faulty sensor, wiring issues, or a damaged connector.

3. How can I diagnose the OBDII code B0179 in my Cadillac?

- Diagnosing the code B0179 involves using a diagnostic scanner to retrieve the code, checking the sensor's wiring and connector for any visible damage, and testing the sensor's resistance.

4. What are the repair options for fixing OBDII code B0179 in a Cadillac?

- Repair options include replacing the output air temperature sensor 2, repairing any damaged wiring or connectors, and clearing the code with a diagnostic scanner.

5. Can I drive my Cadillac with the OBDII code B0179?

- It is not recommended to drive your Cadillac with the OBDII code B0179, as it can lead to further damage and potentially affect the vehicle's performance.

6. How much does it cost to repair the OBDII code B0179 in a Cadillac?

- The cost of repairing the OBDII code B0179 in a Cadillac can vary depending on the extent of the issue, but it typically ranges from $100 to $300 for parts and labor.

7. Will the OBDII code B0179 cause my Cadillac to fail an emissions test?

- Yes, the OBDII code B0179 can cause your Cadillac to fail an emissions test, as it indicates a problem with the vehicle's emissions control system.

8. Can I reset the OBDII code B0179 in my Cadillac without fixing the underlying issue?

- While you can clear the code temporarily with a diagnostic scanner, it is not recommended to reset the code without fixing the underlying issue, as it will likely reappear.

9. How long does it take to repair the OBDII code B0179 in a Cadillac?

- The repair time for the OBDII code B0179 in a Cadillac can vary depending on the specific issue, but it typically takes 1-2 hours for a professional mechanic to diagnose and fix the problem.

10. Is the OBDII code B0179 a common issue in Cadillacs?

- The OBDII code B0179 related to the output air temperature sensor 2 is less common compared to other codes, but it can still occur in Cadillacs due to sensor or wiring issues.