AutoCodes – Buick – B0210 Buick

B0210 Buick Code - Rear Blower Motor Speed Low

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: B0210 Buick indicates Rear Blower Motor Speed Low.
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 843

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 B0210 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 B0210 Buick - Rear Blower Motor Speed Low - AutoCodes.com — B0210 Buick Code - Rear Blower Motor Speed Low

What does this mean?

What are the Possible Causes of the DTC B0210 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 B0210 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 B0210 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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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 B0210 Buick Code

1. What does the OBDII code B0210 mean on a Buick?

The B0210 code indicates that the rear blower motor in your Buick is operating at a lower speed than expected or is not functioning properly.

2. What are the symptoms of the B0210 code?

Symptoms include reduced or no airflow from the rear HVAC vents, difficulty adjusting rear climate control settings, or unusual noises from the rear blower motor.

3. What causes the B0210 code to appear?

Common causes include a faulty rear blower motor, a damaged blower motor resistor, wiring issues, or a malfunctioning rear HVAC control module.

4. How can I diagnose the B0210 code?

Start by inspecting the rear blower motor, checking for proper voltage at the motor, testing the blower motor resistor, and examining wiring and connectors for damage or corrosion.

5. Can I drive my Buick with the B0210 code?

Yes, you can drive with this code, but the rear climate control system may not work properly, reducing comfort for rear passengers.

6. How do you fix the B0210 code on a Buick?

Repairs may involve replacing the rear blower motor, repairing or replacing the blower motor resistor, fixing damaged wiring, or reprogramming the HVAC control module if needed.

7. Is the B0210 code related to a fuse issue?

A blown fuse could cause the rear blower motor to stop working and trigger the code, so checking the fuse for the rear HVAC system is a good first step.

8. How much does it cost to fix the B0210 code?

Repair costs vary but typically range from $100 to $400, depending on whether the issue is with the blower motor, resistor, or wiring.

9. Can a low battery cause the B0210 code?

Yes, a low or failing battery can cause voltage irregularities that may affect the rear blower motor and trigger the code.

10. Do I need special tools to repair the B0210 code?

Basic tools like a multimeter and a screwdriver may be enough for diagnosis and repair, but advanced tools like a scan tool may be needed to clear the code or reprogram the module.