AutoCodes – Cadillac – B0851 Cadillac

B0851 Cadillac Code - Memory Seat Module Battery 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: B0851 Cadillac indicates Memory Seat Module Battery 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 701

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 B0851 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 B0851 Cadillac - Memory Seat Module Battery Out Of Range - AutoCodes.com — B0851 Cadillac Code - Memory Seat Module Battery Out Of Range

What does this mean?

What are the Possible Causes of the DTC B0851 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 B0851 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 B0851 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 B0851 Cadillac Code

1. What does the OBDII code B0851 mean on a Cadillac?

B0851 indicates that the Memory Seat Module (MSM) has detected a battery voltage that is out of the expected range.

2. What are the common symptoms of code B0851 in a Cadillac?

Symptoms may include non-functional memory seat settings, intermittent seat adjustment issues, or failure to save new seat positions.

3. What causes the B0851 code to appear in a Cadillac?

The most common causes are a weak or failing vehicle battery, poor electrical connections at the Memory Seat Module, or a faulty MSM.

4. Can a bad battery trigger code B0851?

Yes, a weak or undercharged battery can cause the voltage to fall out of range, triggering the B0851 code.

5. How do I diagnose the B0851 code on my Cadillac?

Start by checking the battery voltage and connections, inspect the wiring to the Memory Seat Module, and test the MSM for proper functionality.

6. Is it safe to drive with the B0851 code on my Cadillac?

Yes, it is generally safe to drive, but the memory seat functionality may not work properly until the issue is resolved.

7. How do I fix code B0851 on a Cadillac?

Common fixes include charging or replacing the battery, cleaning and securing electrical connections to the MSM, or replacing the Memory Seat Module if faulty.

8. Can a blown fuse cause the B0851 code in a Cadillac?

While unlikely, a blown fuse in the seat adjustment circuit could potentially cause voltage issues leading to the B0851 code.

9. How much does it cost to repair the B0851 code on a Cadillac?

The cost can vary depending on the issue, ranging from $50 for a battery charge or connection repair to $300-$600 if the Memory Seat Module needs replacement.

10. Can I clear the B0851 code without repairing the issue?

You can clear the code with an OBDII scanner, but if the underlying problem isn't resolved, the code will likely return.