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Engine-Codes – Generic – B0212

B0212 Code - Rear Blower Motor Speed Open

Quick Answer

The B0212 diagnostic trouble code (DTC) indicates that there is an open circuit in the rear blower motor speed circuit. Common causes include Faulty wiring harness, Defective blower motor resistor, Malfunctioning blower motor relay. 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 indicates Rear Blower Motor Speed Open.
Common causes
Common causes include Faulty wiring harness, Defective blower motor resistor, Malfunctioning blower motor relay.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code B0212 Description

The B0212 diagnostic trouble code (DTC) indicates that there is an open circuit in the rear blower motor speed circuit. This means that the rear blower motor is not receiving the proper electrical signal to operate at the desired speed. The rear blower motor is responsible for circulating air in the rear of the vehicle's cabin, providing ventilation and climate control for passengers in the back seats. When this circuit is open, the rear blower motor may not function at all or may only operate at a single speed, impacting the overall comfort and air circulation in the vehicle.

OBDII Code B0212 - Rear Blower Motor Speed Open
B0212 Code - Rear Blower Motor Speed Open

Common Causes of B0212

  1. Faulty wiring harness
  2. Defective blower motor resistor
  3. Malfunctioning blower motor relay
  4. HVAC control module issues
  5. Electrical connection issues

Symptoms of B0212

  1. Rear blower motor not working at all
  2. Rear blower motor only operating at one speed
  3. Inconsistent airflow in the rear of the vehicle
  4. Unusual noises coming from the rear blower motor
  5. Inability to adjust rear blower motor speed from the HVAC controls

How to Fix B0212

  1. Begin by conducting a thorough visual inspection of the rear blower motor circuit, checking for any obvious signs of damage or disconnection.
  2. Use a multimeter to test the continuity of the wiring harness and connections to identify any open circuits.
  3. Test the blower motor resistor and relay for proper functionality and replace if necessary.
  4. If the issue persists, inspect the HVAC control module for faults and replace if needed.
  5. Clear the DTC from the vehicle's memory using a diagnostic scan tool after completing the repairs.

Cost to Fix B0212

The cost of repairing a B0212 code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the parts required for this repair, such as a blower motor resistor or relay, can range from $50 to $150. Labor costs typically range from $100 to $300, depending on the complexity of the repair and the shop's hourly rate. It's recommended to obtain quotes from local auto repair shops to get a more accurate estimate for your specific vehicle.

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Code B0212 Information for Specific Makes

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 Code

1. What does OBDII code B0212 mean?

Code B0212 indicates an open circuit or malfunction in the rear blower motor speed control, preventing proper operation of the rear HVAC system.

2. What are the symptoms of code B0212?

Common symptoms include no airflow from the rear vents, inability to adjust the rear blower speed, or inconsistent rear HVAC operation.

3. What causes code B0212?

Possible causes include a faulty rear blower motor, damaged wiring or connectors, a failed resistor, or a malfunctioning HVAC control module.

4. Can I still drive my vehicle with code B0212?

Yes, the vehicle is typically safe to drive, but rear passengers may experience reduced comfort due to the lack of climate control in the rear cabin.

5. How do I diagnose code B0212?

Start by inspecting the rear blower motor, checking for damaged wiring or loose connections, and testing the resistor and control module with a multimeter.

6. How can I fix code B0212?

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

7. What tools are needed to repair code B0212?

You’ll need a multimeter, wiring diagram for your vehicle, and possibly a scan tool to clear the code after repairs.

8. How much does it cost to fix a B0212 code?

Costs can vary depending on the issue, ranging from $50 for simple wiring repairs to $300 or more for blower motor or module replacement.

9. Can I reset the B0212 code without fixing the problem?

You can clear the code with a scan tool, but it will likely return unless the underlying issue is resolved.

10. How can I prevent code B0212 in the future?

Regularly inspect the rear blower motor and its wiring, and ensure the HVAC system is not overloaded or damaged during use.

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