Based on diagnostic data for Ford vehicles, is not a product model but a specific Diagnostic Trouble Code (DTC) that indicates a fault in your car's electrical system. Fault Code Overview: B166A:60 : Heated Mirror Circuit Open. : Typically associated with the Passenger Door Module (PDM)
: Your passenger-side wing mirror will likely fail to defrost or clear fog when the heated mirror function is activated. The ":60" Suffix : This sub-type code specifically points to an event-based failure
, often meaning a "signal comparison failure" or an open circuit where the computer expects a connection. Common Causes & Fixes If you are seeing this code on a scan tool like , here is what is usually happening: Broken Heating Element
: The most common cause is a thin wire inside the mirror glass itself that has burned out or snapped. Wiring Issues
: Corroded or loose pins in the door harness connector or behind the mirror glass. Blown Fuse
: Check your owner's manual for the specific fuse related to "Heated Mirrors" or "Door Modules." Quick Troubleshooting Tip
Try switching on your rear window defroster (which usually triggers the heated mirrors). If the driver's side gets warm but the passenger side stays cold, the issue is almost certainly a faulty mirror glass unit ford b166a60
on the passenger side, which is a relatively inexpensive and easy part to replace. or the specific wiring diagram for your Ford model?
Info on some DTC errors, read with FORScan - Ford Focus Club
(often written as B166A60) is a manufacturer-specific Diagnostic Trouble Code (DTC)
for Ford vehicles. It indicates a fault within the vehicle's "Body" system, specifically relating to the side mirrors. Meaning of DTC B166A:60 This code is typically defined as: "Heated Mirror Circuit Open" MFC Auction
: Refers to the "Body" system (includes lighting, mirrors, and safety systems).
: The specific fault identifier for the heated mirror circuit. Based on diagnostic data for Ford vehicles, is
: A sub-type byte that specifies the nature of the fault, in this case, an open circuit or an interrupt in the wiring. MFC Auction Common Causes
According to diagnostic reports for Ford models like the Focus or Kuga, this error is often triggered by: Damaged Wiring
: A break or "open" in the wiring harness that supplies power to the mirror's heating element. Blown Fuse
: A failure in the fuse protecting the mirror defroster circuit. Faulty Mirror Glass
: The heating element integrated into the mirror glass itself may have burned out or become disconnected. Connection Issues
: Loose or corroded pins in the door module or the connector behind the mirror glass. Typical Location Unplug the electrical connector from the brake switch
This code is usually found when scanning the following modules with a professional tool or software like FORScan: : Driver Door Control Unit : Passenger Door Control Unit MFC Auction fuse location for a specific Ford model to resolve this issue? AI responses may include mistakes. Learn more Ford VEHICLE DIAGNOSTIC REPORT - MFC Auction House
On many Fords, after replacing the seat cover, mat, or even disconnecting the battery, the OCS loses its "empty seat" reference. Using FORScan or a high-end scan tool, navigate to RCM → Special Functions → OCS Calibration / Zero-Point Reset. Follow the on-screen instructions (typically: empty seat, engine off, key on, wait 20 seconds).
If wiring and the sensor are intact, visit a Ford dealership. They can check for TSB (Technical Service Bulletin) 22-2147 or similar, which provides a software patch for the RCM that desensitizes it to normal signal fluctuations.
This is the most common permanent repair. Ford does not sell the OCS mat separately for most models; you must buy the entire lower seat cushion assembly with the mat pre-installed. Part numbers vary by model, but for an F-150, expect FL3Z-1560000-A or similar. After replacement, you must perform the zero-point calibration procedure.
Pro tip: Some independent shops can install an aftermarket OCS bypass module (like the Airbag 360 OCS Emulator), but this disables the occupant classification and is illegal for on-road use in most jurisdictions—not recommended.