AutoCodes – Generic – B2747

B2747 Code - Traction Control Circuit Switch Low

Quick Answer

The Traction Off indicator is controlled by the instrument cluster via serial data messages from the Electronic Brake Control Module (EBCM). Common causes include Faulty Traction Control Circuit Switch, Traction Control Circuit Switch harness is open or shorted, Traction Control Circuit 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: B2747 indicates Traction Control Circuit Switch Low.
Common causes: Common causes include Faulty Traction Control Circuit Switch, Traction Control Circuit Switch harness is open or shorted, Traction Control Circuit 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 786

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 Jan 26, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2747 Description

The Traction Off indicator is controlled by the instrument cluster via serial data messages from the Electronic Brake Control Module (EBCM). When the Body Control Module (BCM) sees the traction control switch input grounded through the momentary traction control switch, it sends a serial data message to the EBCM that tells the EBCM that the traction control switch has been pressed. The EBCM then disables traction control and sends a serial data message to the instrument cluster to turn the Traction Off indicator ON. Each time the ignition is cycled from OFF to ON, the traction control system is enabled. The Diagnostic Trouble Code (DTC) sets when the BCM detects a ground on the traction control switch signal circuit for longer than 60 seconds.

OBDII Code B2747 - Traction Control Circuit Switch Low - AutoCodes.com — B2747 Code - Traction Control Circuit Switch Low

What does this mean?

What are the Possible Causes of the DTC B2747?

Faulty Traction Control Circuit Switch
Traction Control Circuit Switch harness is open or shorted
Traction Control Circuit Switch circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2747?

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 B2747 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.

Need more information about the B2747 code?

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Need Help with the Code?

Get the B2747 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2747 Buick — Traction Control Circuit Switch Low
B2747 Cadillac — Traction Control Circuit Switch Low
B2747 Chevrolet — Traction Control Circuit Switch Low
B2747 GMC — Traction Control Circuit Switch Low

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 B2747 Code

What does the OBDII code B2747 mean?

The B2747 code indicates a problem with the traction control switch circuit, specifically a low voltage or signal issue.

What are the common symptoms of code B2747?

Symptoms may include the traction control system being disabled, the traction control warning light being illuminated, and reduced vehicle stability during slippery conditions.

What causes the B2747 code to appear?

Common causes include a faulty traction control switch, damaged or corroded wiring, a poor electrical connection in the circuit, or a malfunctioning control module.

How is code B2747 diagnosed?

A technician will use an OBDII scanner to confirm the code, inspect the traction control switch and its wiring for damage, and test the circuit for proper voltage and continuity.

Can I drive my car with the B2747 code?

While the vehicle may still be drivable, the traction control system may not function properly, increasing the risk of losing control in slippery or unstable driving conditions.

How do I fix the B2747 code?

Repairs may involve replacing the traction control switch, repairing damaged wiring or connectors, or addressing any issues with the control module.

What tools are needed to repair the B2747 code?

Common tools include an OBDII scanner, a multimeter for electrical testing, and basic hand tools to access and replace components.

Will clearing the B2747 code fix the problem?

Clearing the code may turn off the warning light temporarily, but the underlying issue must be resolved to prevent the code from returning.

How much does it cost to fix the B2747 code?

Repair costs vary depending on the problem, but replacing the traction control switch typically costs $50â€“$200, while wiring repairs may cost $50â€“$150.

Can a failing traction control system cause other problems?

Yes, a malfunctioning traction control system can reduce vehicle stability and may lead to increased tire wear or accidents in poor driving conditions.