AutoCodes – Cadillac – B0856 Cadillac

B0856 Cadillac 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 Cadillac 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.

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Code Popularity 1,243

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

What does this mean?

What are the Possible Causes of the DTC B0856 Cadillac?

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 Cadillac?

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 Cadillac 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.

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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 Cadillac Code

1. What are the common symptoms of OBDII code B0856 in a Cadillac related to the Memory Seat Module 5 Volt Reference Out of Range?

The common symptoms include malfunctioning memory seat functions, erratic seat adjustments, and possible issues with other electronic modules in the vehicle.

2. What are the possible causes of the OBDII code B0856 in a Cadillac?

Possible causes of this code include a faulty memory seat module, damaged wiring or connectors, a malfunctioning power supply, or issues with the vehicle's electrical system.

3. How can I diagnose the OBDII code B0856 in a Cadillac?

Diagnosing this code may involve using a diagnostic scanner to retrieve the fault codes, checking the wiring and connectors related to the memory seat module, and testing the power supply to the module.

4. Can I still drive my Cadillac with the OBDII code B0856 present?

It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to avoid potential inconvenience or further damage to the memory seat module.

5. How can I repair the OBDII code B0856 in a Cadillac myself?

Repairing this code may involve replacing the memory seat module, repairing or replacing damaged wiring or connectors, and ensuring the power supply to the module is functioning correctly.

6. Is it necessary to reset the OBDII code B0856 after repairing the issue in a Cadillac?

Yes, it is recommended to clear the code using a diagnostic scanner after repairing the underlying issue to reset the system and ensure the code does not reappear.

7. Will the OBDII code B0856 in a Cadillac reset itself after a certain number of driving cycles?

In some cases, the code may reset itself after a certain number of successful driving cycles once the underlying issue has been resolved. However, it is advisable to use a diagnostic scanner to clear the code manually.

8. Can a low battery voltage cause the OBDII code B0856 in a Cadillac to appear?

Yes, a low battery voltage or electrical issues in the vehicle can potentially trigger this code, so it is important to check the battery and overall electrical system as part of the diagnostic process.

9. Are there any common related codes that may appear along with the OBDII code B0856 in a Cadillac?

Depending on the root cause of the issue, related codes such as communication errors with other modules or seat position sensor faults may also be present alongside the B0856 code.

10. How long does it typically take to repair the OBDII code B0856 related to the Memory Seat Module in a Cadillac?

The repair time can vary depending on the exact cause of the code and the complexity of the repair process, but it may range from a quick fix involving connector cleaning to a more involved module replacement that could take a few hours.