B0212 - Rear Blower Motor Speed Open

Repair Importance Level: 3/3

Repair Difficulty Level: 3/3

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Possible causes

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)

What does this mean?

Possible symptoms

Engine Light ON (or Service Engine Soon Warning Light)

B0212 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 - Rear Blower Motor Speed Open - Engine-Codes.com

B0212 Information for specific makes

B0212 BUICK Rear Blower Motor Speed Open

B0212 CADILLAC Rear Blower Motor Speed Open

B0212 CHEVROLET Rear Blower Motor Speed Open

B0212 GMC Rear Blower Motor Speed Open

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