AutoCodes – Generic – B0514

B0514 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 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 1,372

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 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 - Output Air Temperature Sensor 4 Circuit - AutoCodes.com — B0514 Code - Output Air Temperature Sensor 4 Circuit

What does this mean?

What are the Possible Causes of the DTC B0514?

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?

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 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.

Need more information about the B0514 code?

Need more information on how to fix the B0514 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0514 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0514 Buick — Output Air Temperature Sensor 4 Circuit
B0514 Cadillac — Output Air Temperature Sensor 4 Circuit
B0514 Chevrolet — Output Air Temperature Sensor 4 Circuit
B0514 GMC — Output Air Temperature Sensor 4 Circuit

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 Code

1. What are common symptoms of OBDII code B0514 (Output Air Temperature Sensor 4 Circuit)?

- Common symptoms include issues with the heating or cooling system, erratic temperature readings, and potential engine performance issues.

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

- The possible causes include a faulty output air temperature sensor, wiring issues, connector problems, or a malfunctioning HVAC control module.

3. How can I diagnose the issue related to OBDII code B0514?

- To diagnose the problem, you can use an OBDII scanner to retrieve the specific error code, visually inspect the sensor and its wiring for damage, and perform resistance checks to determine sensor functionality.

4. Can I continue driving with OBDII code B0514 present?

- It is not recommended to continue driving with this code active, as it can lead to potential issues with the heating or cooling system and may affect engine performance.

5. How can I repair OBDII code B0514?

- Repairing this code may involve replacing the output air temperature sensor, repairing or replacing damaged wiring, ensuring proper connector connection, or reprogramming the HVAC control module if necessary.

6. Are there any DIY tips for fixing OBDII code B0514?

- DIY tips include checking and cleaning the sensor connector, inspecting wiring for damage, and ensuring proper sensor installation to address the issue.

7. Can a faulty output air temperature sensor cause other problems in the vehicle?

- Yes, a faulty sensor can lead to incorrect temperature readings, affecting the vehicle's heating and cooling system performance and potentially impacting engine efficiency.

8. How much does it typically cost to fix OBDII code B0514?

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

9. Is it necessary to reset the OBDII system after repairing code B0514?

- Yes, it is recommended to clear the error code and reset the OBDII system after repairing the issue to ensure the problem has been resolved.

10. Can a mechanic help with diagnosing and repairing OBDII code B0514?

- Yes, a qualified mechanic can assist in diagnosing the problem, performing the necessary repairs, and ensuring the proper functioning of the output air temperature sensor circuit.