Acura B1239: Open or Short in the Front Mode Control Motor Circuit
Is your scanner showing Acura B1239?
No worries. We'll show you what it means and how to deal with it.
Acura B1239: Open or Short in the Front Mode Control Motor Circuit
OVERVIEWWhat Does The Acura B1239 Code Mean?
Poor communication between the Front Mode Control Motor and the Climate Control Unit (“Short or “Open””) condition.
What Are The Potential Causes Of The Acura B1239 Code?
- Loose wires or poor connections on the Front Mode Control Motor circuit
- Perform the HVAC self-diagnostic function with the HDS
- “Short or “Open” in the wires between the Climate Control Unit and the Front Mode Control Motor
- Faulty Front Mode Control Motor
- Faulty Climate Control Unit
Recommended Parts
Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:
>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Acura Climate Control Unit
>>> New Genuine Honda Heater Blend Mode Motor Assembly OEM 79140SNAA01
Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!
Reference Sources
2007-2009 Acura MDX HVAC Climate Control Service Manual for B1239 – Pages 79-82.
