Ford B166a60 • Best & Complete

A severely discharged battery or jump-start can cause the RCM to see erratic voltage from the OCS during its power-up self-test, temporarily setting B166A60.

The wires running under the passenger seat experience constant flexing as the seat moves forward and back. Over time, copper strands inside the insulation break, creating high resistance or intermittent shorts. This is the #1 cause of B166A60.

Q: Can I still drive my Ford with code B166A60? A: Yes, the vehicle is mechanically safe to drive. However, the passenger airbag may not deploy, making it unsafe for front-seat passengers.

Q: Will B166A60 clear itself? A: Only if it was caused by a transient issue (e.g., low voltage). A physical fault will remain until repaired.

Q: Is B166A60 covered under a Ford recall? A: There is no nationwide recall for this specific code, but some models (certain 2015-2017 F-150s) have extended warranty coverage on the OCS mat—up to 10 years or 120,000 miles. Check with a Ford dealer using your VIN.

Q: Why did B166A60 appear after I had my seats shampooed? A: Water intrusion into the OCS mat is a common cause. The mat is not fully waterproof. Allow the seat to dry for 48 hours in direct sunlight and then recalibrate; the code may clear.

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. ford b166a60

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.

After making the repair:

Note on Safety: If your brake lights are not working, do not drive the vehicle on public roads until the switch is replaced, as this poses a significant safety risk to you and others.

The Ford Diagnostic Trouble Code (DTC) B166A:60 generally identifies a Heated Mirror Circuit Open fault, typically within the Passenger Door Module (PDM). This code indicates that the vehicle's computer has detected a break in the electrical path to the heated mirror element on the passenger side.

Drafting a Useful Blog Post: "Troubleshooting Ford DTC B166A:60" 1. Introduction

Start by explaining what the code means in plain English. If a driver notices their passenger side mirror isn't defrosting on cold mornings and they pull this code using a tool like FORScan, they are dealing with a circuit interruption. 2. Common Symptoms A severely discharged battery or jump-start can cause

Non-functional Mirror Heating: The mirror remains frosted or foggy even when the rear defrost/heated mirror switch is active.

Stored Fault Code: The code may be "permanent" or present during a module self-test, even if it doesn't trigger a Check Engine Light (MIL) on the dashboard. 3. Top Causes to Investigate

Сканирование на ошибки — Ford Focus Sedan II, 1 ... - Drive2

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 Note on Safety: If your brake lights are

: 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

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