AutoCodes – Buick – B0212 Buick

B0212 Buick Code - Rear Blower Motor Speed Open

Quick Answer

The Auxiliary Blower Motor Control Module is an interface between the Heating, Ventilation, and Air Conditioning (HVAC) Control Module and the Auxiliary (Rear) Blower Motor. Common causes include Faulty Auxiliary (Rear) Blower Motor, Auxiliary (Rear) Blower Motor harness is open or shorted, Auxiliary (Rear) Blower Motor 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: B0212 Buick indicates Rear Blower Motor Speed Open.
Common causes: Common causes include Faulty Auxiliary (Rear) Blower Motor, Auxiliary (Rear) Blower Motor harness is open or shorted, Auxiliary (Rear) Blower Motor 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 914

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 B0212 Buick Description

The Auxiliary Blower Motor Control Module is an interface between the Heating, Ventilation, and Air Conditioning (HVAC) Control Module and the Auxiliary (Rear) Blower Motor. The auxiliary blower motor control module has 5 circuits: a B+ input, ground, a control signal from the HVAC module, a B+ output and a low side Pulse Width Modulation (PWM) control to the Auxiliary (Rear) Blower Motor. The HVAC control module provides a low side (PWM) signal to the auxiliary blower motor control module in order to request the auxiliary blower motor speed. The auxiliary blower motor control module grounds the blower motor using a low side PWM signal in order to vary the auxiliary blower motor speed.

OBDII Code B0212 Buick - Rear Blower Motor Speed Open - AutoCodes.com — B0212 Buick Code - Rear Blower Motor Speed Open

What does this mean?

What are the Possible Causes of the DTC B0212 Buick?

Faulty Auxiliary (Rear) Blower Motor
Auxiliary (Rear) Blower Motor harness is open or shorted
Auxiliary (Rear) Blower Motor circuit poor electrical connection
Faulty Auxiliary Blower Motor Control Module
Faulty Heating, Ventilation, and Air Conditioning (HVAC)

How to Fix the DTC B0212 Buick?

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 B0212 Buick 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 B0212 Buick Code

1. What are the common symptoms of OBDII code B0212 in a Buick related to the rear blower motor speed being open?

The common symptoms include the rear blower motor not functioning at all, or operating at only one speed regardless of the settings.

2. What are possible causes of OBDII code B0212 in a Buick indicating a rear blower motor speed open issue?

Possible causes may include a faulty blower motor resistor, wiring issues, a malfunctioning blower motor control module, or a problem with the HVAC control unit.

3. How can I diagnose the rear blower motor speed open issue in my Buick with OBDII code B0212?

Diagnosis typically involves checking the condition of the blower motor resistor, inspecting the wiring for any damage or loose connections, testing the blower motor control module, and ensuring proper communication with the HVAC control unit.

4. Can I continue driving my Buick with OBDII code B0212 indicating a rear blower motor speed open problem?

It is not recommended to continue driving with this issue, as the rear blower motor plays a crucial role in maintaining proper ventilation and comfort inside the vehicle.

5. How can I reset the OBDII code B0212 in my Buick after fixing the rear blower motor speed open issue?

After repairing the issue causing the code B0212, you can reset the code using an OBDII scanner or by disconnecting the car's battery for a few minutes to clear the fault code.

6. Are there any DIY repair tips for addressing OBDII code B0212 related to the rear blower motor speed being open in a Buick?

DIY repair tips include checking and replacing the blower motor resistor, inspecting and repairing any damaged wiring, and ensuring all connections are secure and free of corrosion.

7. Should I seek professional help to fix OBDII code B0212 in my Buick linked to the rear blower motor speed open issue?

If you are not familiar with automotive electrical systems and HVAC components, it is advisable to seek professional help to accurately diagnose and repair the problem to ensure it is resolved correctly.

8. How much does it typically cost to repair OBDII code B0212 indicating a rear blower motor speed open fault in a Buick?

The cost of repairs can vary depending on the specific cause of the issue, but it may involve replacing components like the blower motor resistor, control module, or addressing wiring problems, which can range from $100 to $300 or more.

9. Can extreme weather conditions contribute to triggering OBDII code B0212 related to the rear blower motor speed open in a Buick?

Extreme temperatures or moisture levels can potentially affect the blower motor and its components, leading to issues that trigger the fault code B0212 in the vehicle's system.

10. Is it possible for other OBDII codes to be related to the B0212 code indicating a rear blower motor speed open problem in a Buick?

Yes, other related codes may include issues with the blower motor circuit, blower motor speed control, or communication faults within the HVAC system that can trigger multiple fault codes along with B0212.