AutoCodes – GMC – B0514 GMC

B0514 GMC Code - Output Air Temperature Sensor 4 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 4, Output Air Temperature Sensor 4 harness is open or shorted, Output Air Temperature Sensor 4 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: B0514 GMC indicates Output Air Temperature Sensor 4 Circuit.
Common causes: Common causes include Faulty Output Air Temperature Sensor 4, Output Air Temperature Sensor 4 harness is open or shorted, Output Air Temperature Sensor 4 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 1,528

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 11, 2021

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0514 GMC 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 B0514 GMC - Output Air Temperature Sensor 4 Circuit - AutoCodes.com — B0514 GMC Code - Output Air Temperature Sensor 4 Circuit

What does this mean?

What are the Possible Causes of the DTC B0514 GMC?

Faulty Output Air Temperature Sensor 4
Output Air Temperature Sensor 4 harness is open or shorted
Output Air Temperature Sensor 4 circuit poor electrical connection
Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

How to Fix the DTC B0514 GMC?

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

B0514 05: Output Air Temperature Sensor 4 Circuit Short to Battery or Open
B0514 02: Output Air Temperature Sensor 4 Circuit Short to Ground

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0514 GMC 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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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 B0514 GMC Code

1. What are the common symptoms of OBDII code B0514 GMC?

- Common symptoms include inaccurate readings from the output air temperature sensor, issues with the HVAC system, and potential activation of the Check Engine Light.

2. What are the possible causes of OBDII code B0514 GMC?

- The code B0514 GMC can be triggered by a faulty output air temperature sensor, damaged wiring or connectors related to the sensor, or a malfunction in the HVAC control module.

3. How can I diagnose the OBDII code B0514 GMC?

- Diagnosis typically involves using a scan tool to retrieve the specific code, testing the output air temperature sensor for proper function, and inspecting the related wiring and connectors for any signs of damage.

4. Can I continue driving with OBDII code B0514 GMC active?

- It is generally safe to drive with this code, but it is recommended to address the underlying issue promptly to prevent potential HVAC system malfunctions and ensure accurate temperature readings.

5. How can I repair OBDII code B0514 GMC?

- Repair options may include replacing the faulty output air temperature sensor, repairing or replacing damaged wiring or connectors, and resetting the code using a scan tool after the repairs are completed.

6. Is it possible to reset OBDII code B0514 GMC without fixing the underlying issue?

- While it is possible to reset the code temporarily, the underlying issue causing the code will persist, and the Check Engine Light is likely to reappear until the problem is properly addressed.

7. Can extreme temperatures affect the output air temperature sensor and trigger OBDII code B0514 GMC?

- Yes, extreme temperatures can affect sensor performance and potentially trigger the B0514 code. It's essential to ensure the sensor is properly insulated and protected from extreme conditions.

8. Are there any preventive maintenance tips to avoid OBDII code B0514 GMC?

- Regularly inspecting the output air temperature sensor, checking the wiring and connectors for damage, and keeping the HVAC system well-maintained can help prevent issues that trigger the B0514 code.

9. Will OBDII code B0514 GMC impact the vehicle's overall performance?

- While the code itself may not directly impact performance, addressing the underlying issue promptly is crucial to ensure the proper functioning of the HVAC system and accurate temperature readings.

10. How long does it typically take to repair OBDII code B0514 GMC?

- The repair time can vary depending on the extent of the issue and the availability of parts. In general, a skilled mechanic can diagnose and repair the B0514 code within a few hours to a day.