AutoCodes – GMC – B2222 GMC

B2222 GMC Code - Left 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 Left Mirror Select Switch, Left Mirror Select Switch harness is open or shorted, Left 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: B2222 GMC indicates Left Mirror Select Switch Fault.
Common causes: Common causes include Faulty Left Mirror Select Switch, Left Mirror Select Switch harness is open or shorted, Left 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 640

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 B2222 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 B2222 GMC - Left Mirror Select Switch Fault - AutoCodes.com — B2222 GMC Code - Left Mirror Select Switch Fault

What does this mean?

What are the Possible Causes of the DTC B2222 GMC?

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

How to Fix the DTC B2222 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 B2222 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 B2222 GMC Code

1. What are the common symptoms of OBDII code B2222 GMC (Left Mirror Select Switch Fault)?

The common symptoms include the inability to adjust the left mirror using the mirror select switch, erratic mirror movement, or complete mirror failure.

2. What could cause the OBDII code B2222 GMC to trigger?

The code is typically triggered due to a fault in the left mirror select switch circuitry, such as a short circuit, open circuit, or a faulty switch.

3. How can I diagnose the cause of the left mirror select switch fault?

To diagnose the issue, you can inspect the wiring harness for any visible damage, test the switch for continuity and proper operation, and use a scan tool to read the specific fault codes.

4. Can a DIY enthusiast repair the left mirror select switch fault?

Yes, if you have experience with automotive electrical systems and the necessary tools, you may be able to replace the faulty switch or repair the wiring yourself. However, professional assistance is recommended for complex electrical issues.

5. What are the potential risks of driving with the OBDII code B2222 GMC active?

Driving with the code active may result in the inability to adjust the left mirror, leading to compromised visibility and safety while driving. It is advisable to address the issue promptly.

6. Is resetting the OBDII code B2222 GMC sufficient to fix the left mirror select switch fault?

Resetting the code may temporarily clear the warning, but it will not fix the underlying issue causing the fault. Proper diagnosis and repair are necessary to resolve the problem.

7. Are there any common mistakes to avoid when dealing with the left mirror select switch fault?

One common mistake is overlooking simple causes such as a loose connection or a blown fuse. It's essential to check these possibilities before proceeding with more complex repairs.

8. Can extreme weather conditions affect the left mirror select switch and trigger the B2222 code?

Yes, extreme temperatures or moisture exposure can potentially damage the switch or wiring, leading to a fault. Properly sealing the electrical components can help prevent weather-related issues.

9. How much does it typically cost to repair the OBDII code B2222 GMC related to the left mirror select switch fault?

The cost of repair can vary depending on the extent of the damage, the need for replacement parts, and labor charges. It is advisable to obtain multiple quotes from reputable automotive repair shops.

10. Will the OBDII code B2222 GMC prevent my vehicle from passing an emissions test?

The B2222 code is related to the left mirror select switch and is not directly related to emissions. However, it is essential to address any active fault codes before an emissions test to ensure the vehicle is in proper working condition.