AutoCodes – Mercury – B1406 Mercury

B1406 Mercury Code - Driver Power Window Down Circuit Short To Ground

Quick Answer

The driver power window is controlled by the Front Electronics Module (FEM). Common causes include Driver Power Window Regulator Electric Motor, Faulty Master Window Regulator Control Switch, Faulty Front Electronics Module (FEM). Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1406 Mercury indicates Driver Power Window Down Circuit Short To Ground.
Common causes: Common causes include Driver Power Window Regulator Electric Motor, Faulty Master Window Regulator Control Switch, Faulty Front Electronics Module (FEM).
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 683

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 04, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B1406 Mercury Description

The driver power window is controlled by the Front Electronics Module (FEM). The driver power window regulator control switch and motor are hardwired directly to the FEM. The FEM will read the window regulator control switch actuation and provide the corresponding output to the window motor. If one-touch operation is selected, the FEM powers the driver window motor for seven seconds or until the FEM senses the motor is stalled. If the window track, regulator or glass weatherstrips cause the glass to bind, the FEM may interpret this as a motor stalled condition and halt motor operation.

OBDII Code B1406 Mercury - Driver Power Window Down Circuit Short To Ground - AutoCodes.com — B1406 Mercury Code - Driver Power Window Down Circuit Short To Ground

What does this mean?

What are the Possible Causes of the DTC B1406 Mercury?

Driver Power Window Regulator Electric Motor
Faulty Master Window Regulator Control Switch
Faulty Front Electronics Module (FEM)
Master Window Regulator Control Switch harness is open or shorted
Master Window Regulator Control Switch circuit poor electrical connection

How to Fix the DTC B1406 Mercury?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1406 Mercury code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1406 Mercury code?

Need more information on how to fix the B1406 Mercury code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1406 Mercury code diagnosed by a professional: Find a repair shop in your area

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1406 Mercury Code

1. What are some common symptoms of OBDII code B1406 in a Mercury related to the driver power window?

The common symptoms include the driver power window being stuck in the down position or not responding to the window switch.

2. What does the OBDII code B1406 indicating a "Driver Power Window Down Circuit Short To Ground" mean in a Mercury?

This code indicates that there is a short circuit to ground in the circuit responsible for controlling the driver power window.

3. What are some possible causes of OBDII code B1406 in a Mercury?

Possible causes include damaged wiring, a faulty power window motor, a malfunctioning window switch, or a problem with the window regulator.

4. How can I diagnose the issue causing OBDII code B1406 in my Mercury?

To diagnose the issue, you can start by checking the wiring connections, testing the power window motor, inspecting the window switch, and examining the window regulator for any faults.

5. Is it safe to continue driving my Mercury with the OBDII code B1406 related to the driver power window issue?

It is not recommended to continue driving the vehicle with this issue, as it may result in the window being stuck in a position that compromises safety and security.

6. Can I repair OBDII code B1406 in my Mercury on my own?

Depending on your experience and knowledge, you may be able to repair the issue yourself by following the diagnostic steps and replacing any faulty components like wiring, motor, switch, or regulator.

7. How much does it typically cost to repair OBDII code B1406 in a Mercury at a professional repair shop?

The cost of repairing this issue can vary depending on the specific cause of the problem, but it may range from a few hundred to over a thousand dollars, including parts and labor.

8. Are there any temporary solutions to address the driver power window issue indicated by OBDII code B1406 in my Mercury?

One temporary solution could be disconnecting the power to the window motor to prevent further damage, but this should be followed by a proper repair as soon as possible.

9. Will resetting the OBDII code B1406 in my Mercury make the issue go away?

Resetting the code may temporarily clear the error message, but if the underlying issue causing the code is not addressed, it is likely to reappear.

10. How can I prevent OBDII code B1406 from occurring again in my Mercury in the future?

To prevent this code from reoccurring, it is important to conduct regular maintenance checks on the power window system, including inspecting wiring, lubricating moving parts, and ensuring proper operation of the components.