AutoCodes – Chevrolet – B2109 Chevrolet

B2109 Chevrolet Code - Power Seat Switch Shorted

Quick Answer

When the Power Seat Switches are pressed, the Memory Seat Module (MSM) receives an input from the switch. Common causes include Faulty Power Seat Adjuster Switch, Power Seat Adjuster Switch harness is open or shorted, Power Seat Adjuster 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: B2109 Chevrolet indicates Power Seat Switch Shorted.
Common causes: Common causes include Faulty Power Seat Adjuster Switch, Power Seat Adjuster Switch harness is open or shorted, Power Seat Adjuster 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 777

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 Sep 17, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code B2109 Chevrolet Description

When the Power Seat Switches are pressed, the Memory Seat Module (MSM) receives an input from the switch. The MSM commands the driver seat to move in response to the switch input. If a seat switch continues to be active for 30 seconds after the motor controlled by that switch reaches the end of its travel, the switch will be considered shorted and the MSM will set the Diagnostic Trouble Code (DTC) or if a position sensor DTC is current and the associated switch is active for 30 continuous seconds, the switch will be considered shorted and the MSM will set the DTC.

OBDII Code B2109 Chevrolet - Power Seat Switch Shorted - AutoCodes.com — B2109 Chevrolet Code - Power Seat Switch Shorted

What does this mean?

What are the Possible Causes of the DTC B2109 Chevrolet?

Faulty Power Seat Adjuster Switch
Power Seat Adjuster Switch harness is open or shorted
Power Seat Adjuster Switch circuit poor electrical connection
Faulty Memory Seat Module (MSM)

How to Fix the DTC B2109 Chevrolet?

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 B2109 Chevrolet 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 B2109 Chevrolet code?

Need more information on how to fix the B2109 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2109 Chevrolet code diagnosed by a professional: Find a repair shop in your area

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 B2109 Chevrolet Code

1. What does the OBDII code B2109 mean for a Chevrolet?

B2109 indicates that the power seat switch circuit in your Chevrolet is shorted, often due to wiring or switch issues.

2. What are the common symptoms of the B2109 code?

Symptoms include non-functional power seat adjustments, intermittent seat movement, or blown fuses related to the power seat system.

3. What causes the B2109 code to appear?

The most common causes are a faulty power seat switch, damaged wiring, corroded connectors, or a short circuit in the power seat system.

4. Can I still drive my Chevrolet with the B2109 code?

Yes, you can still drive the vehicle, but the power seat adjustment feature may not work, which could affect comfort and safety.

5. How do I diagnose the B2109 code?

Start by inspecting the power seat switch, wiring, and connectors for damage or corrosion. Use a multimeter to check for shorts or continuity issues.

6. How can I fix the B2109 code?

Repair or replace the damaged power seat switch, fix any faulty wiring or connectors, and clear the code with an OBDII scanner.

7. How much does it cost to repair the B2109 code?

Costs vary depending on the issue. Replacing a power seat switch typically costs $50-$200, while wiring repairs may add labor costs.

8. Can a blown fuse cause the B2109 code?

Yes, a blown fuse for the power seat system can be both a symptom and a cause of the issue, especially if thereâ€™s an underlying short circuit.

9. Will clearing the B2109 code fix the issue?

Clearing the code without addressing the root cause will not fix the issue, and the code is likely to reappear.

10. Should I take my Chevrolet to a mechanic for the B2109 code?

While some DIYers can handle this repair, itâ€™s recommended to consult a professional if you're unsure about diagnosing or repairing electrical components.