B0150 BUICK - Air Flow Position Feedback #3 Circuit Malfunction
B0150 BUICK Possible Causes
- Faulty Auxiliary Mode Actuator
- Auxiliary Mode Actuator harness is open or shorted
- Auxiliary Mode Actuator circuit poor electrical connection
- Faulty Auxiliary Heating, Ventilation, and Air Conditioning (HVAC) Control Module
Cost of diagnosing the B0150 BUICK code
The cost of diagnosing the B0150 BUICK code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
B0150 BUICK Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B0150 BUICK Meaning
The actuators operate using 5 circuits. A 5-volt reference, low reference, signal circuit and two bi-directional 0 or 12 volt control circuits. The Heating, Ventilation, and Air Conditioning (HVAC) Control Module supplies a low reference and 5-volt reference to the potentiometer. The HVAC control module monitors the voltage drop across the potentiometer on the door position signal circuit. As the actuator door changes position the door position signal circuit voltage also changes. The two bi-directional control circuits enable the actuator to operate. Both circuits are set to 0 volts when the HVAC control module detects, from the feedback potentiometer, that the actuator is in the desired position. In order to move the actuator, the HVAC control module switches the appropriate control circuit to 12 volts.