AutoCodes.com | All About OBDII Engine Codes
AutoCodes - Buick - B0145 BUICK

B0145 BUICK Code - Auxiliary Mode Actuator

- Code Popularity: 574 Views
- Repair Importance Level: 1/3
- Repair Difficulty Level: 2/3
Table of contents
By AutoCodes.com - Updated Mar 10, 2021
Share on Facebook   Share on Twitter   Share on Linkedin

|B0145 BUICK code possible causes

  • Faulty Auxiliary Mode Actuator
  • Auxiliary Mode Actuator harness is open or shorted
  • Auxiliary Mode Actuator circuit poor electrical connection
  • Faulty Heating, Ventilation, and Air Conditioning (HVAC) Control Module

|How do I fix code B0145 BUICK code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Does your car have Safety Recalls? → Check here

|Cost of diagnosing B0145 BUICK code

Labor: 1.0

The cost of diagnosing the B0145 BUICK code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle's make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.

|What are B0145 BUICK code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|B0145 BUICK code description

The Auxiliary Heating, Ventilation, and Air Conditioning (HVAC) actuators are a 5-wire bi-directional electric motor that incorporates a feedback potentiometer. Low reference, 5-volt reference, position signal, and 2 control circuits enable the actuator to operate. The control circuits use either a 0 or 12 volt value to coordinate the actuator movement. When the actuator is at rest, both control circuits have a value of 0 volts. In order to move the actuator, the HVAC control module grounds one of the control circuits while providing the other with 12 volts. The auxiliary HVAC control module reverses the polarity of the control circuits to move the actuator in the opposite direction. When the actuator shaft rotates, the potentiometers adjustable contact changes the door position signal between 0-5 volts. This signal then is converted into a count value where as 1 volt will equal 51 counts.
The auxiliary HVAC control module calibrates the travel range of the HVAC door actuators when it is initially powered by the battery positive voltage circuit. During calibration, the module commands the actuators in each direction until door travel is stopped. The module stores the minimum door positions and the maximum door positions of each actuator into memory. The total travel range is calculated by subtracting the minimum door position from the maximum door position.

OBDII Code b0145 buick - Auxiliary Mode Actuator - AutoCodes.com
B0145 BUICK Code - Auxiliary Mode Actuator

|Need more information with the B0145 BUICK code?

Need more information on how to fix the B0145 BUICK code? Get Access to Factory Service Manuals

|Need help with a B0145 BUICK code?

Get the b0145 buick code diagnosed by a professional: Find a repair shop in your area

|B0145 BUICK code comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the b0145 buick code? Have you replaced any parts?
Any information is appreciated. Thanks