AutoCodes – Buick – B2228 Buick

B2228 Buick Code - Mirror Left Switch Fault

Quick Answer

The driver door switch signal circuits provide inputs to the Driver Door Module (DDM) when the mirror switch is activated. Common causes include Faulty Mirror Left Switch, Mirror Left Switch harness is open or shorted, Mirror Left Switch 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: B2228 Buick indicates Mirror Left Switch Fault.
Common causes: Common causes include Faulty Mirror Left Switch, Mirror Left Switch harness is open or shorted, Mirror Left Switch 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.

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Code Popularity 682

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 Oct 10, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2228 Buick Description

The driver door switch signal circuits provide inputs to the Driver Door Module (DDM) when the mirror switch is activated. These inputs allow the DDM to detect a mirror direction request. The DDM provides both power and ground to the mirror switches. When a mirror switch is activated to the right, left, up or down position, ground is supplied through the mirror switch to the signal circuit, which is pulled low. When the DDM detects low voltage on the signal circuit, it will command the mirror to rotate in the direction selected. The DDM controls passenger mirror functions by sending mirror control messages to the Passenger Door Module (PDM) on the serial data line and the PDM then commands the passenger mirror. The DDM monitors both the driver and passenger mirror switch signal circuits to determine how long a ground has been applied. If the DDM detects that a ground is applied for greater than 20 seconds, a Diagnostic Trouble Code (DTC) is set.

OBDII Code B2228 Buick - Mirror Left Switch Fault - AutoCodes.com — B2228 Buick Code - Mirror Left Switch Fault

What does this mean?

What are the Possible Causes of the DTC B2228 Buick?

Faulty Mirror Left Switch
Mirror Left Switch harness is open or shorted
Mirror Left Switch circuit poor electrical connection
Faulty Driver Door Module (DDM)

How to Fix the DTC B2228 Buick?

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 B2228 Buick 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.

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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 B2228 Buick Code

1. What are the common symptoms of OBDII code B2228 Buick (Mirror Left Switch Fault)?

The common symptoms include non-functioning or erratic behavior of the left side mirror switch in your Buick vehicle.

2. What can cause the OBDII code B2228 Buick to appear?

The code B2228 is triggered when there is a fault detected in the left side mirror switch circuit of the vehicle.

3. How can I diagnose the Mirror Left Switch Fault (B2228) in my Buick?

Diagnosing the Mirror Left Switch Fault involves checking the wiring, connections, and the switch itself for any signs of damage or malfunction.

4. Can I repair the Mirror Left Switch Fault (B2228) in my Buick on my own?

If you have experience with automotive electrical systems, you may be able to repair the Mirror Left Switch Fault by replacing the faulty switch or repairing any damaged wiring.

5. Is it safe to drive my Buick with the OBDII code B2228 (Mirror Left Switch Fault) present?

While the code B2228 may not affect the drivability of your vehicle, it is recommended to address the issue promptly to ensure all vehicle controls are functioning correctly.

6. Will resetting the OBDII code B2228 in my Buick make the issue go away?

Resetting the code may temporarily clear the fault, but if the underlying issue with the mirror left switch persists, the code is likely to reappear.

7. Are there any common mistakes to avoid when dealing with the B2228 Buick code?

One common mistake to avoid is overlooking simple issues like loose connections or blown fuses when diagnosing the Mirror Left Switch Fault.

8. How much does it typically cost to repair the Mirror Left Switch Fault in a Buick?

The cost of repairing the Mirror Left Switch Fault can vary depending on the extent of the issue and whether you choose to repair it yourself or take it to a professional mechanic.

9. Can extreme weather conditions cause the Mirror Left Switch Fault (B2228) in a Buick?

Extreme weather conditions, particularly water ingress or corrosion, can sometimes lead to electrical issues like the Mirror Left Switch Fault in a Buick.

10. Is the Mirror Left Switch Fault (B2228) a common issue in Buick vehicles?

While it may not be one of the most common OBDII codes, the Mirror Left Switch Fault (B2228) can occur in Buick vehicles, especially in older models or those exposed to harsh environmental conditions.