AutoCodes – Generic – B2516

B2516 Code - Blower Control Circuit Failure

Quick Answer

The Body Control Module (BCM) monitors the Blower Fan. Common causes include Faulty Blower Fan, Blower Fan harness is open or shorted, Blower Fan circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B2516 indicates Blower Control Circuit Failure.
Common causes: Common causes include Faulty Blower Fan, Blower Fan harness is open or shorted, Blower Fan circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 11,641

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2516 Description

The Body Control Module (BCM) monitors the Blower Fan. The BCM sets the OBDII code when the Blower Fan is not to factory specifications.

OBDII Code B2516 - Blower Control Circuit Failure - AutoCodes.com — B2516 Code - Blower Control Circuit Failure

What does this mean?

What are the Possible Causes of the DTC B2516?

Faulty Blower Fan
Blower Fan harness is open or shorted
Blower Fan circuit poor electrical connection

How to Fix the DTC B2516?

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 B2516 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 B2516 code?

Need more information on how to fix the B2516 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2516 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2516 Lexus — Open In Quarter Window Motor Right 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 B2516 Code

1. What are the common symptoms of OBDII code B2516 (Blower Control Circuit Failure)?

- Common symptoms include the HVAC blower motor not working, no air coming from the vents, or the blower motor running at inconsistent speeds.

2. What are the possible causes of OBDII code B2516?

- Possible causes include a faulty blower motor, a malfunctioning blower motor resistor, a damaged blower motor relay, or issues with the HVAC control module.

3. How can I diagnose OBDII code B2516?

- You can diagnose this code by checking the blower motor for power and ground, inspecting the blower motor resistor for any signs of damage, and testing the blower motor relay for proper functionality.

4. What are some repair tips for resolving OBDII code B2516?

- Repair tips include replacing the blower motor if it's faulty, replacing the blower motor resistor if needed, checking and replacing the blower motor relay, and ensuring proper connections to the HVAC control module.

5. Can OBDII code B2516 be fixed without professional help?

- Depending on your experience and tools, you may be able to fix this code yourself by following repair guides and using basic automotive repair skills. However, if you're unsure, it's recommended to seek professional help.

6. How critical is it to address OBDII code B2516 promptly?

- It's important to address this code promptly, especially if the blower motor is not working correctly. Ignoring the issue can lead to discomfort while driving and may affect the overall functionality of the vehicle's HVAC system.

7. Are there any preventive measures to avoid OBDII code B2516 in the future?

- Regular maintenance of the HVAC system, such as cleaning or replacing the cabin air filter, can help prevent issues that may trigger OBDII code B2516. Additionally, addressing any HVAC system abnormalities early can help avoid more significant problems.

8. How long does it typically take to repair OBDII code B2516?

- The repair time for OBDII code B2516 can vary depending on the specific cause of the issue. Simple fixes like replacing a relay may take less than an hour, while more complex repairs involving the blower motor or control module may take longer.

9. Can OBDII code B2516 affect the vehicle's overall performance?

- While OBDII code B2516 primarily affects the HVAC system's blower control circuit, ignoring the issue can impact overall comfort and convenience while driving. It's essential to address the code to maintain a comfortable cabin environment.

10. Is it safe to continue driving with OBDII code B2516 present?

- It is generally safe to drive with OBDII code B2516, but it's recommended to address the issue promptly to ensure proper HVAC system functionality. Driving without a working blower motor can lead to discomfort, especially in extreme weather conditions.