AutoCodes – Buick – B2476 Buick

B2476 Buick Code - Cellular Phone Select Service Switch

Quick Answer

The OnStar® button assembly consists of 3 buttons: Call/Answer, OnStar® Call Center, and OnStar® Emergency. Common causes include Faulty Inside Rearview Mirror, Inside Rearview Mirror harness is open or shorted, Inside Rearview Mirror 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: B2476 Buick indicates Cellular Phone Select Service Switch.
Common causes: Common causes include Faulty Inside Rearview Mirror, Inside Rearview Mirror harness is open or shorted, Inside Rearview Mirror 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 1,541

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 May 01, 2023

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B2476 Buick Description

The OnStar® button assembly consists of 3 buttons: Call/Answer, OnStar® Call Center, and OnStar® Emergency. The Telematics Communication Interface Control Module supplies the OnStar® button assembly with 10 V via the 10 V reference circuit. When pressed, each button completes the circuit across a resistor or set of resistors allowing a specific voltage to be returned to the Telematics Communication Interface Control Module over the signal circuit. Depending upon the voltage range returned, the Telematics Communication Interface Control Module is able to identify which button has been pressed. The Diagnostic Trouble Code (DTC) will be set when the Telematics Communication Interface Control Module detects a failure on the 10 V reference circuit.

OBDII Code B2476 Buick - Cellular Phone Select Service Switch - AutoCodes.com — B2476 Buick Code - Cellular Phone Select Service Switch

What does this mean?

What are the Possible Causes of the DTC B2476 Buick?

Faulty Inside Rearview Mirror
Inside Rearview Mirror harness is open or shorted
Inside Rearview Mirror circuit poor electrical connection
Faulty Telematics Communication Interface Control Module

How to Fix the DTC B2476 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 does this mean?

Code Tech Notes

B2476:04 Cellular Phone Select Service Switch Open
B2476:59 Cellular Phone Select Service Switch Protection Time-out

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B2476 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 B2476 Buick Code

1. What does OBDII code B2476 mean on a Buick?

B2476 indicates an issue with the Cellular Phone Select Service Switch, typically related to the vehicle's communication or telematics system.

2. What are the common symptoms of code B2476 in a Buick?

Common symptoms include a malfunctioning or unresponsive cellular phone feature, error messages on the infotainment display, or limited telematics functionality.

3. What causes the B2476 code to appear on a Buick?

The code can be caused by a faulty Cellular Phone Select Service Switch, wiring issues, a defective telematics control module, or software glitches in the system.

4. Is code B2476 related to safety features in my Buick?

No, this code primarily affects the cellular phone or telematics system and does not directly impact critical safety features.

5. How do I diagnose the B2476 code on my Buick?

Start by scanning for codes using an OBDII scanner, inspecting the Cellular Phone Select Service Switch for damage, and checking the wiring and connectors for loose or corroded connections.

6. Can I drive my Buick with the B2476 code active?

Yes, the vehicle remains drivable, but features like hands-free calling or telematics services may not work properly until the issue is resolved.

7. How is the B2476 code repaired in a Buick?

Repairs may involve replacing the Cellular Phone Select Service Switch, repairing damaged wiring, or reprogramming the telematics module.

8. Can a software update fix the B2476 code on a Buick?

In some cases, a software update to the telematics or infotainment system may resolve the issue if it is caused by a software glitch.

9. How much does it cost to fix the B2476 code in a Buick?

Repair costs vary depending on the issue but may range from $100 to $300 if a switch replacement or minor wiring repair is needed.

10. Do I need a professional mechanic to fix the B2476 code?

While minor inspections and resets can be done by experienced DIYers, diagnosing and repairing telematics-related issues often requires a professional with specialized tools.