AutoCodes – Generic – B3577

B3577 Code - Suspension Control Select Switch Contact Malfunction

Quick Answer

The Electronic Suspension Control (ESC) Module supplies 5 volts and a ground to the suspension control switch's voltage divider circuit. Common causes include Faulty Suspension Control Select Switch, Suspension Control Select Switch harness is open or shorted, Suspension Control 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: B3577 indicates Suspension Control Select Switch Contact Malfunction.
Common causes: Common causes include Faulty Suspension Control Select Switch, Suspension Control Select Switch harness is open or shorted, Suspension Control 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 648

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 Mar 09, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B3577 Description

The Electronic Suspension Control (ESC) Module supplies 5 volts and a ground to the suspension control switch's voltage divider circuit. The suspension control switch changes the resistance value of the switch circuit which alters the voltage level received by the ESC module on the suspension control signal circuit. There are two possible voltage levels, and each voltage level corresponds to a switch selection position. The two switch positions are TOUR and SPORT. The ESC module monitors the voltage level on the suspension control switch signal circuit, and will set a Diagnostic Trouble Code (DTC) if the detected voltage level is not within the calibrated amount.

OBDII Code B3577 - Suspension Control Select Switch Contact Malfunction - AutoCodes.com — B3577 Code - Suspension Control Select Switch Contact Malfunction

What does this mean?

What are the Possible Causes of the DTC B3577?

Faulty Suspension Control Select Switch
Suspension Control Select Switch harness is open or shorted
Suspension Control Select Switch circuit poor electrical connection
Faulty Electronic Suspension Control (ESC) Module

How to Fix the DTC B3577?

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 B3577 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 B3577 code?

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Need Help with the Code?

Get the B3577 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B3577 Buick — Suspension Control Select Switch Contact Malfunction
B3577 Cadillac — Suspension Control Select Switch Contact Malfunction
B3577 Chevrolet — Suspension Control Select Switch Contact Malfunction
B3577 GMC — Suspension Control Select Switch Contact Malfunction

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 B3577 Code

1. What are the common symptoms of OBDII code B3577 (Suspension Control Select Switch Contact Malfunction)?

The common symptoms include non-functional suspension control select switch, warning lights on the dashboard, and potential suspension system malfunctions.

2. What are the possible causes of OBDII code B3577?

Possible causes of B3577 include a faulty suspension control select switch, wiring issues, poor electrical connections, or a malfunctioning suspension control module.

3. How can I diagnose OBDII code B3577?

Diagnosing B3577 involves using a diagnostic scanner to retrieve the trouble code, inspecting the suspension control select switch and related wiring for any visible damage, and testing the electrical connections for proper continuity.

4. Can I continue driving with OBDII code B3577?

It is not recommended to continue driving with code B3577 as it can lead to potential suspension malfunctions and compromise the vehicle's handling and safety.

5. How can I repair OBDII code B3577?

Repairing B3577 involves replacing the faulty suspension control select switch, repairing any damaged wiring or connections, and clearing the trouble code with a diagnostic scanner.

6. Is it possible to reset OBDII code B3577 without fixing the underlying issue?

Resetting the code without addressing the underlying issue will only temporarily clear the warning lights but will not fix the malfunction in the suspension control system.

7. Are there any DIY tips for troubleshooting OBDII code B3577?

DIY tips for troubleshooting B3577 include checking the fuse related to the suspension control system, inspecting the switch for physical damage, and ensuring all electrical connections are secure.

8. How much does it typically cost to repair OBDII code B3577 at a mechanic?

The cost of repairing B3577 can vary depending on the extent of the issue, but it generally ranges from $100 to $300 for parts and labor at a mechanic.

9. Can a faulty suspension control select switch cause other suspension problems besides triggering OBDII code B3577?

Yes, a faulty suspension control select switch can potentially cause other suspension problems such as incorrect ride height adjustment or suspension settings not functioning properly.

10. How can I prevent OBDII code B3577 from recurring in the future?

To prevent B3577 from recurring, ensure proper maintenance of the suspension control system, address any electrical issues promptly, and avoid physical damage to the suspension control select switch.