AutoCodes – Buick – B2226 Buick

B2226 Buick Code - Mirror Right 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 Right Switch, Mirror Right Switch harness is open or shorted, Mirror Right 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: B2226 Buick indicates Mirror Right Switch Fault.
Common causes: Common causes include Faulty Mirror Right Switch, Mirror Right Switch harness is open or shorted, Mirror Right 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 927

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 B2226 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 B2226 Buick - Mirror Right Switch Fault - AutoCodes.com — B2226 Buick Code - Mirror Right Switch Fault

What does this mean?

What are the Possible Causes of the DTC B2226 Buick?

Faulty Mirror Right Switch
Mirror Right Switch harness is open or shorted
Mirror Right Switch circuit poor electrical connection
Faulty Passenger Door Module (PDM)

How to Fix the DTC B2226 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 B2226 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 B2226 Buick Code

1. What does the OBDII code B2226 mean in a Buick?

B2226 indicates a fault in the right mirror switch circuit, often due to wiring issues, a faulty switch, or a problem with the mirror motor.

2. What are the common symptoms of the B2226 code in a Buick?

Symptoms include the right side mirror not adjusting properly, unresponsiveness from the mirror control switch, or intermittent operation.

3. What causes the B2226 code to appear in a Buick?

Common causes include a defective right mirror control switch, damaged wiring or connectors, or a malfunctioning mirror motor.

4. Can I still drive my Buick with the B2226 code?

Yes, the vehicle can still be driven safely, but the right mirror adjustment may not work, which could affect visibility and driving convenience.

5. How can I diagnose the B2226 code in my Buick?

Start by inspecting the wiring and connectors for damage, test the right mirror switch for functionality, and check the mirror motor for continuity.

6. How do I fix the B2226 code on a Buick?

Repairs may include replacing the right mirror control switch, repairing damaged wiring or connectors, or replacing the mirror motor if necessary.

7. Can a blown fuse cause the B2226 code in a Buick?

While not common, a blown fuse in the mirror circuit could potentially cause this code. Always check the fuse box as part of diagnostics.

8. How much does it cost to fix the B2226 code on a Buick?

Depending on the issue, repairs can cost between $50 and $300, with switch replacement being on the lower end and mirror motor replacement on the higher end.

9. What tools are needed to troubleshoot the B2226 code?

Youâ€™ll need a multimeter, a basic set of tools for accessing the switch and wiring, and possibly a scan tool to clear the code after repairs.

10. Is the B2226 code specific to Buick vehicles?

No, the B2226 code can appear in other vehicles, but its meaning and repair process may vary depending on the manufacturer. Always refer to your Buickâ€™s service manual.