AutoCodes – Generic – B1F05

B1F05 Code - Electrochromatic Mirror Control Circuit

Quick Answer

The driver electrochromatic mirror is controlled by the Body Control Module (BCM). Common causes include Faulty Exterior Mirror, Exterior Mirror harness is open or shorted, Exterior Mirror circuit poor electrical connection. 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: B1F05 indicates Electrochromatic Mirror Control Circuit.
Common causes: Common causes include Faulty Exterior Mirror, Exterior Mirror harness is open or shorted, Exterior Mirror circuit poor electrical connection.
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 1,969

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 Sep 05, 2019

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

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

Code B1F05 Description

The driver electrochromatic mirror is controlled by the Body Control Module (BCM). The BCM receives the dimming control from the sensor in the Interior Rearview Mirror. The BCM send a Bus message to the Driver Door Module (DDM) which turns the dimming on and off. At night the dimming will be canceled when the vehicle is in reverse. The Body Control Module sends a command to the Door Module to turn the Day/Night dimming on and the Auto Day/Night Mirror Signal circuit is shorted to ground, shorted to voltage or open. The Door Module will set the OBDII code when the Electrochromatic Mirror is inoperative.

OBDII Code B1F05 - Electrochromatic Mirror Control Circuit - AutoCodes.com — B1F05 Code - Electrochromatic Mirror Control Circuit

What does this mean?

What are the Possible Causes of the DTC B1F05?

Faulty Exterior Mirror
Exterior Mirror harness is open or shorted
Exterior Mirror circuit poor electrical connection
Faulty Door Module

How to Fix the DTC B1F05?

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 does this mean?

Code Tech Notes

B1F05-11 ELECTROCHROMATIC MIRROR CONTROL CIRCUIT SHORT TO GROUND
B1F05-12 ELECTROCHROMATIC MIRROR CONTROL CIRCUIT SHORT TO BATTERY
B1F05-13 ELECTROCHROMATIC MIRROR CONTROL CIRCUIT OPEN

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1F05 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 B1F05 code?

Need more information on how to fix the B1F05 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1F05 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1F05 Chrysler — Electrochromatic Mirror Control Circuit
B1F05 Dodge — Electrochromatic Mirror Control Circuit
B1F05 Jeep — Electrochromatic Mirror Control Circuit
B1F05 RAM — Electrochromatic Mirror Control Circuit

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 B1F05 Code

1. What are the common symptoms of OBDII code B1F05 (Electrochromatic Mirror Control Circuit)?

The common symptoms of code B1F05 include malfunctioning auto-dimming mirrors, erratic mirror adjustments, or complete failure of the mirror control system.

2. What are the possible causes of OBDII code B1F05?

The possible causes of code B1F05 can include a faulty electrochromatic mirror control module, damaged wiring or connectors in the mirror circuit, or a malfunctioning ambient light sensor.

3. How can I diagnose OBDII code B1F05?

Diagnosing code B1F05 involves inspecting the electrochromatic mirror control module for any visible damage, testing the wiring and connectors for continuity, and checking the ambient light sensor's functionality using a multimeter.

4. Can a DIYer repair OBDII code B1F05 at home?

Repairing code B1F05 may require advanced electrical diagnostic skills and specialized tools. It is recommended to consult a professional mechanic or auto electrician for proper diagnosis and repair.

5. Is it safe to drive with OBDII code B1F05 present?

While code B1F05 may not directly affect the drivability of the vehicle, it is important to address the issue promptly as malfunctioning mirror controls can impact visibility and overall safety while driving.

6. How much does it typically cost to repair OBDII code B1F05?

The cost of repairing OBDII code B1F05 can vary depending on the exact cause of the issue. It is advisable to obtain a diagnosis from a qualified technician to determine the repair cost accurately.

7. Can resetting the OBDII system clear code B1F05?

Resetting the OBDII system may temporarily clear the code, but if the underlying issue causing code B1F05 is not addressed, the code is likely to reappear upon the next system check.

8. Are there any preventive measures to avoid OBDII code B1F05 in the future?

To prevent OBDII code B1F05, it is essential to regularly inspect the mirror control system, ensure proper wiring connections, and promptly address any issues with the electrochromatic mirror functionality.

9. Will replacing the electrochromatic mirror fix OBDII code B1F05?

While a faulty mirror could be the root cause of code B1F05, it is recommended to diagnose the issue comprehensively before replacing any components to ensure an accurate repair and prevent unnecessary expenses.

10. How long does it take to repair OBDII code B1F05?

The repair time for OBDII code B1F05 can vary based on the exact cause of the issue and the complexity of the repair. It is best to consult with a professional technician to get an estimate of the repair duration.