AutoCodes – GMC – B2104 GMC

B2104 GMC 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: B2104 GMC 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 657

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 B2104 GMC 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 B2104 GMC - Power Seat Switch Shorted - AutoCodes.com — B2104 GMC Code - Power Seat Switch Shorted

What does this mean?

What are the Possible Causes of the DTC B2104 GMC?

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 B2104 GMC?

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 B2104 GMC 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 B2104 GMC code?

Need more information on how to fix the B2104 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2104 GMC 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 B2104 GMC Code

1. What are the common symptoms of OBDII code B2104 GMC (Power Seat Switch Shorted)?

The common symptoms of this code may include non-functional power seat controls, inability to adjust the seat position, or erratic movement of the power seat.

2. What are the possible causes of OBDII code B2104 GMC?

The code B2104 GMC (Power Seat Switch Shorted) is typically caused by a short circuit in the power seat switch or its wiring, a faulty power seat control module, or damaged connectors.

3. How can I diagnose the source of OBDII code B2104 GMC?

To diagnose the source of this code, you can perform a visual inspection of the power seat switch and wiring, check for any visible damage, test the power seat control module, and use a multimeter to check for continuity in the circuit.

4. Can I drive my vehicle with OBDII code B2104 GMC active?

It is generally safe to drive your vehicle with this code, but you may experience inconvenience due to the non-functional power seat controls. However, it is recommended to address the issue promptly to avoid further electrical problems.

5. How can I repair OBDII code B2104 GMC?

Repairing this code involves fixing the short circuit in the power seat switch or wiring, replacing a faulty power seat control module, and ensuring all connectors are properly connected and free of damage.

6. Is it possible to reset OBDII code B2104 GMC without repairs?

Resetting the code without addressing the underlying issue may temporarily clear the error code, but it will likely reappear until the root cause of the problem is fixed.

7. Are there any DIY tips for resolving OBDII code B2104 GMC?

While some basic diagnostic steps can be taken at home, resolving the code may require specialized tools and expertise. It is advisable to consult a qualified mechanic for proper diagnosis and repair.

8. Can extreme temperatures affect OBDII code B2104 GMC?

Extreme temperatures can potentially worsen electrical issues, including shorts in the power seat switch or wiring. It is essential to address the problem promptly to prevent further damage.

9. How long does it typically take to repair OBDII code B2104 GMC?

The repair time for this code can vary depending on the exact cause of the issue, availability of parts, and the expertise of the technician. In general, it may take a few hours to a day to diagnose and fix the problem.

10. Is OBDII code B2104 GMC a common issue in GMC vehicles?

While the prevalence of this specific code may vary, power seat switch-related issues are relatively common in vehicles equipped with power seat controls. Regular maintenance and care can help prevent such problems.