AutoCodes – GMC – B0212 GMC

B0212 GMC 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 GMC 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

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
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC B0212 GMC?

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 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0212 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.

Need more information about the B0212 GMC code?

Need more information on how to fix the B0212 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0212 GMC code diagnosed by a professional: Find a repair shop in your area

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 GMC Code

1. What are the common symptoms of OBDII code B0212 GMC (Rear Blower Motor Speed Open)?

- The common symptoms include the rear blower motor not functioning at all or operating at only one speed.

2. What can cause the OBDII code B0212 GMC to trigger?

- This code is typically triggered by a fault in the rear blower motor circuit, such as a damaged wiring harness or a faulty blower motor resistor.

3. How can I diagnose the issue related to OBDII code B0212 GMC?

- You can use a multimeter to test the continuity of the wiring, check the blower motor resistor for proper functioning, and inspect the blower motor itself for any signs of damage.

4. What are some repair tips for addressing OBDII code B0212 GMC?

- Repair tips may include repairing or replacing any damaged wiring, replacing the faulty blower motor resistor, or installing a new rear blower motor if necessary.

5. Can I continue driving my vehicle with OBDII code B0212 GMC?

- It is not recommended to continue driving the vehicle with this code active, as the rear blower motor's malfunction may impact the HVAC system's overall performance and passenger comfort.

6. How much does it typically cost to repair OBDII code B0212 GMC?

- The cost of repairs can vary depending on the exact cause of the issue, but it may range from $100 to $300 for parts and labor.

7. Is OBDII code B0212 GMC a serious issue that requires immediate attention?

- While it may not be a critical issue that affects the vehicle's drivability, addressing this code promptly is recommended to ensure proper functioning of the rear blower motor and HVAC system.

8. Can I reset OBDII code B0212 GMC with a simple DIY method?

- Resetting the code may be possible by disconnecting the vehicle's battery for a few minutes, but it is important to diagnose and address the underlying issue to prevent the code from reappearing.

9. Will OBDII code B0212 GMC cause any other problems in my vehicle?

- If left unresolved, this code may lead to discomfort for rear passengers due to the rear blower motor's improper operation and may affect the overall climate control system's performance.

10. How can I prevent OBDII code B0212 GMC from occurring in the future?

- Regularly inspecting and maintaining the rear blower motor system, checking the wiring for damage, and promptly addressing any issues can help prevent the recurrence of this code.