AutoCodes – GMC – B2226 GMC

B2226 GMC 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 GMC 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 563

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

What does this mean?

What are the Possible Causes of the DTC B2226 GMC?

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 GMC?

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 GMC 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 GMC Code

What does the OBDII code B2226 mean for GMC vehicles?

The B2226 code indicates a fault with the right mirror switch, which may affect the operation of the right-side mirror.

What are the common symptoms associated with the B2226 code?

Common symptoms include the right side mirror not adjusting, mirror heating not functioning, or the mirror not folding if equipped with that feature.

What could cause the B2226 code to trigger?

Possible causes include a faulty right mirror switch, damaged wiring, poor connections, or issues with the mirror motor itself.

How can I diagnose the B2226 code?

Start by checking the right mirror switch for continuity, inspect wiring and connectors for damage, and test the mirror motor for proper operation.

Is it safe to drive with the B2226 code active?

While it may not affect the vehicle's drivability, it's advisable to address the issue to ensure proper visibility and functionality of the mirrors.

What are some common repair solutions for the B2226 code?

Repairs may include replacing the right mirror switch, repairing damaged wiring, or replacing the mirror assembly if the motor is faulty.

Can I reset the B2226 code myself?

Yes, you can use an OBDII scanner to clear the code after repairs; however, the underlying issue must be resolved to prevent the code from returning.

How much does it typically cost to repair the B2226 code?

Repair costs can vary widely depending on the specific issue, ranging from $50 for a switch replacement to over $200 if the entire mirror assembly needs replacing.

Will the B2226 code affect other systems in my GMC vehicle?

The B2226 code is specific to the mirror switch; however, if left unaddressed, it may lead to further electrical issues or related components malfunctioning.

Can I perform a DIY fix for the B2226 code?

If you have experience with automotive electrical systems, you can troubleshoot and possibly fix the issue; otherwise, it may be best to consult a professional.