AutoCodes – GMC – B2224 GMC

B2224 GMC Code - Right Mirror Select Switch Fault

Quick Answer

The driver door switch signal circuits provide inputs to the Driver Door Module (DDM) when a mirror select switch is activated. Common causes include Faulty Right Mirror Select Switch, Right Mirror Select Switch harness is open or shorted, Right Mirror Select 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: B2224 GMC indicates Right Mirror Select Switch Fault.
Common causes: Common causes include Faulty Right Mirror Select Switch, Right Mirror Select Switch harness is open or shorted, Right Mirror Select 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 498

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 24, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2224 GMC Description

The driver door switch signal circuits provide inputs to the Driver Door Module (DDM) when a mirror select switch is activated. These inputs allow the DDM to detect a Left (LH) or Right (RH) mirror request. The DDM provides power and ground to the mirror select switches. When a mirror select switch is activated, ground is supplied through the mirror select switch to the signal circuit, which is pulled low. When the DDM detects low voltage on the signal circuit, it will command the mirror in the direction selected. The DDM controls RH mirror functions by sending mirror control messages to the Passenger Door Module (PDM) on the serial data line and the PDM then commands the RH mirror. The DDM monitors both the LH and RH mirror select 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 B2224 GMC - Right Mirror Select Switch Fault - AutoCodes.com — B2224 GMC Code - Right Mirror Select Switch Fault

What does this mean?

What are the Possible Causes of the DTC B2224 GMC?

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

How to Fix the DTC B2224 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 B2224 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 B2224 GMC Code

1. What does the OBDII code B2224 mean for a GMC vehicle?

B2224 indicates a fault in the right mirror select switch circuit, meaning the system has detected an issue with the functionality or communication of the switch that controls the right-side mirror.

2. What are the common symptoms of code B2224?

Common symptoms include the right-side mirror not responding to inputs, erratic mirror movement, or complete inoperability of the right mirror controls.

3. What causes the B2224 code to set on a GMC vehicle?

The code can be triggered by a faulty right mirror select switch, damaged wiring or connectors in the circuit, or an issue with the mirror control module.

4. Can I still drive my GMC vehicle with the B2224 code active?

Yes, you can drive the vehicle, but the right-side mirror adjustment may not work, which could affect visibility and safety.

5. How do I diagnose the cause of the B2224 code?

Diagnosis typically involves inspecting the right mirror select switch, checking for damaged wiring or connectors, and testing the mirror control module for faults.

6. How do I fix the B2224 code on a GMC?

Repairs may include replacing the right mirror select switch, repairing damaged wiring or connectors, or replacing the mirror control module if it's defective.

7. What tools are needed to troubleshoot the B2224 code?

A diagnostic scan tool, a multimeter for checking electrical continuity, and basic hand tools for inspecting and replacing components are typically needed.

8. Can a blown fuse cause the B2224 code?

While unlikely, a blown fuse in the mirror control circuit could contribute to the problem and should be checked as part of the diagnosis.

9. Is the B2224 code covered under warranty for GMC vehicles?

This depends on your specific vehicle's warranty and coverage terms. Check with your GMC dealership to confirm.

10. How much does it cost to fix the B2224 code?

Repair costs vary depending on the root cause but generally range from $50 to $200 for labor and parts, such as replacing the switch or repairing wiring.