AutoCodes – GMC – B0856 GMC

B0856 GMC Code - Memory Seat Module 5 Volt Reference Out of Range

Quick Answer

The Memory Seat Module has two battery voltage supply circuits. Common causes include Faulty Memory Seat Module, Memory Seat Module harness is open or shorted, Memory Seat Module circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: B0856 GMC indicates Memory Seat Module 5 Volt Reference Out of Range.
Common causes: Common causes include Faulty Memory Seat Module, Memory Seat Module harness is open or shorted, Memory Seat Module circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

Save to My Repairs My Repairs

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

Code Popularity 748

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Nov 18, 2024

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 B0856 GMC Description

The Memory Seat Module has two battery voltage supply circuits. The battery 1 voltage supply circuit is used to provide power for the memory seat module logic and internal driver operation. The battery 2 voltage supply circuit is used to provide a high current supply for the memory seat module output devices.

OBDII Code B0856 GMC - Memory Seat Module 5 Volt Reference Out of Range - AutoCodes.com — B0856 GMC Code - Memory Seat Module 5 Volt Reference Out of Range

What does this mean?

What are the Possible Causes of the DTC B0856 GMC?

Faulty Memory Seat Module
Memory Seat Module harness is open or shorted
Memory Seat Module circuit poor electrical connection

How to Fix the DTC B0856 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 B0856 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 B0856 GMC code?

Need more information on how to fix the B0856 GMC code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0856 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 B0856 GMC Code

1. What are the common symptoms of OBDII code B0856 in a GMC vehicle?

- Common symptoms include malfunctioning memory seat functions, such as inability to adjust seat position or memory seat settings not working properly.

2. What does the OBDII code B0856 for Memory Seat Module 5 Volt Reference Out of Range indicate in a GMC car?

- This code indicates that there is an issue with the 5-volt reference signal from the memory seat module in the vehicle.

3. What are the possible causes of OBDII code B0856 in a GMC vehicle?

- Potential causes include a faulty memory seat module, wiring or connector issues, a blown fuse related to the memory seat system, or a malfunctioning power supply to the module.

4. How can I diagnose the OBDII code B0856 in my GMC car?

- Diagnosing this code typically involves checking the memory seat module for proper voltage output, inspecting the wiring and connectors for any damage or corrosion, and testing related fuses and power supply.

5. Can I repair the OBDII code B0856 in my GMC vehicle myself?

- Depending on your level of automotive expertise, you may be able to repair this code yourself by addressing the identified issue, such as replacing a faulty memory seat module or repairing damaged wiring.

6. Is it safe to continue driving with OBDII code B0856 in a GMC car?

- It is generally not recommended to drive with this code present, as it may affect the proper functioning of the memory seat system and potentially lead to further electrical issues in the vehicle.

7. How much does it typically cost to repair OBDII code B0856 in a GMC vehicle?

- The cost of repair can vary depending on the specific cause of the code, but it may involve expenses related to parts replacement, labor costs, and diagnostic fees at a repair shop.

8. Can resetting the OBDII system clear the B0856 code in a GMC car?

- Resetting the OBDII system may temporarily clear the code, but it is important to address the underlying issue causing the code to prevent it from reoccurring.

9. Are there any preventative measures to avoid OBDII code B0856 in a GMC vehicle?

- Regularly inspecting and maintaining the memory seat system, checking for any signs of wear or damage, and addressing any electrical issues promptly can help prevent this code from appearing.

10. How long does it take to repair OBDII code B0856 in a GMC vehicle?

- The repair time can vary depending on the specific cause of the code and the complexity of the fix, but it may take anywhere from a few hours to a full day to complete the repair successfully.