AutoCodesCadillac – B2226 Cadillac

B2226 Cadillac 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 Cadillac 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 601
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Oct 10, 2019
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Code B2226 Cadillac 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 Cadillac - Mirror Right Switch Fault - AutoCodes.com
B2226 Cadillac Code - Mirror Right Switch Fault

What are the Possible Causes of the DTC B2226 Cadillac?

  • 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 Cadillac?

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 Cadillac 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 Cadillac Code

1. What does the OBDII code B2226 mean on a Cadillac?

B2226 indicates a fault in the right-side mirror switch circuit, typically related to a malfunction in the wiring, switch, or associated components.

2. What are the common symptoms of the B2226 code on a Cadillac?

Symptoms include the inability to adjust the right-side mirror, intermittent or unresponsive mirror operation, or no response when using the mirror control switch.

3. What causes the B2226 code to appear on a Cadillac?

The code can be caused by a faulty right mirror switch, damaged wiring or connectors, a short circuit, or an issue with the Body Control Module (BCM).

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

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

5. How do I diagnose the B2226 code on my Cadillac?

Diagnosis involves inspecting the right mirror switch, checking the wiring and connectors for damage or corrosion, and using a scan tool to confirm the fault.

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

Repairs may include replacing the faulty mirror switch, repairing or replacing damaged wiring, or reprogramming/updating the BCM if needed.

7. Can a blown fuse cause the B2226 code on a Cadillac?

Yes, a blown fuse in the mirror adjustment circuit could trigger the code, so checking the fuses is a good first step.

8. Is the B2226 code specific to Cadillacs?

No, while it may appear on other vehicles, the specific meaning and diagnostic steps can vary by make and model.

9. How much does it cost to repair the B2226 code on a Cadillac?

Repair costs can range from $50 to $300 depending on whether the issue is a simple wiring repair or a replacement of the mirror switch or BCM.

10. Can I clear the B2226 code without fixing the problem?

You can clear the code with a scan tool, but it will likely return if the underlying issue isn’t resolved.

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