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

Quick Answer

The B0856 Chevrolet diagnostic trouble code (DTC) specifically refers to the Memory Seat Module 5 Volt Reference being out of range. Common causes include Faulty memory seat module, Wiring or connection issues within the memory seat system, Low voltage or voltage fluctuations in the vehicle's electrical system. 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 Chevrolet indicates Memory Seat Module 5 Volt Reference Out of Range.
Common causes
Common causes include Faulty memory seat module, Wiring or connection issues within the memory seat system, Low voltage or voltage fluctuations in the vehicle's electrical system.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 10, 2024
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Code B0856 Chevrolet Description

The B0856 Chevrolet diagnostic trouble code (DTC) specifically refers to the Memory Seat Module 5 Volt Reference being out of range. In vehicles equipped with memory seat functions, the memory seat module is responsible for storing and recalling the desired seat position settings for the driver and/or passenger. The 5 Volt Reference signal is a crucial input to the memory seat module, as it provides the necessary voltage for the module to operate effectively. When this reference voltage is detected to be out of the acceptable range, the B0856 code is triggered.

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

Common Causes of B0856 Chevrolet

  1. Faulty memory seat module.
  2. Wiring or connection issues within the memory seat system.
  3. Low voltage or voltage fluctuations in the vehicle's electrical system.
  4. Malfunctioning 5 Volt Reference circuit.
  5. Issues with the vehicle's battery or charging system affecting voltage supply.

Symptoms of B0856 Chevrolet

  1. Inability to adjust the seat position using the memory seat functions.
  2. Erratic or inconsistent seat adjustments while using the memory seat controls.
  3. Failure to store or recall saved seat positions.
  4. Illumination of the seat memory system warning light on the dashboard.
  5. Intermittent loss of power to the memory seat module.

How to Fix B0856 Chevrolet

  1. Begin by conducting a thorough inspection of the memory seat module, wiring, and connections to identify any visible damage or loose connections.
  2. Test the 5 Volt Reference circuit using a multimeter to determine if the voltage is within the specified range.
  3. If the voltage is out of range, diagnose potential causes such as a faulty sensor, wiring issue, or malfunctioning component.
  4. Replace any damaged or malfunctioning components, such as the memory seat module or wiring harness, as necessary.
  5. Clear the DTC from the vehicle's onboard diagnostic system and perform a test to ensure the memory seat functions operate correctly.

Cost to Fix B0856 Chevrolet

The typical repair costs for addressing the B0856 Chevrolet code can vary depending on the specific cause of the issue and the parts and labor required for the repair. On average, the cost of replacing a faulty memory seat module or repairing wiring issues related to the memory seat system can range from $200 to $500. However, additional diagnostic fees and labor charges may apply, and rates can vary based on the location, vehicle make and model, and the expertise of the auto repair shop. It is advisable to consult with a professional technician for a more accurate estimate based on the specific circumstances of the vehicle in question.

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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 Chevrolet Code

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

- Common symptoms include disabled memory seat function, erratic seat movements, and possible issues with other electronic components in the vehicle.

2. What are the possible causes of the Memory Seat Module 5 Volt Reference Out of Range code (B0856) in a Chevrolet?

- The code B0856 can be triggered by a faulty memory seat module, damaged wiring or connectors, a malfunctioning power supply, or issues with the control module.

3. How can I diagnose the Memory Seat Module 5 Volt Reference Out of Range code (B0856) in my Chevrolet?

- Diagnosis typically involves using a diagnostic scanner to read the code, checking the wiring and connectors for damage, testing the power supply, and inspecting the memory seat module for any issues.

4. What are some repair tips for addressing the OBDII code B0856 related to the Memory Seat Module in a Chevrolet?

- Repair tips may include checking and repairing any damaged wiring or connectors, replacing the memory seat module if necessary, ensuring the power supply is functioning correctly, and clearing the code with a diagnostic tool after repairs.

5. Can the Memory Seat Module 5 Volt Reference Out of Range code (B0856) affect the overall performance of my Chevrolet?

- While the code may not directly impact the driving performance of the vehicle, it can affect the functionality of the memory seat system and potentially indicate underlying electrical issues that need attention.

6. Is it safe to continue driving my Chevrolet with the OBDII code B0856 related to the Memory Seat Module issue?

- It is generally safe to drive the vehicle with this code, but it is recommended to address the issue promptly to prevent further electrical problems or malfunctions in the memory seat system.

7. How much does it typically cost to repair the Memory Seat Module 5 Volt Reference Out of Range code (B0856) in a Chevrolet?

- Repair costs can vary depending on the specific cause of the issue, but they may range from a few hundred to over a thousand dollars, including parts and labor.

8. Can I reset the B0856 code related to the Memory Seat Module on my Chevrolet without professional help?

- While it is possible to clear the code using a diagnostic scanner, it is recommended to diagnose and repair the underlying issue causing the code to prevent it from reoccurring.

9. Are there any preventive measures I can take to avoid the OBDII code B0856 in my Chevrolet?

- Regularly inspecting the memory seat system, checking for any signs of wiring damage, and addressing any electrical issues promptly can help prevent the occurrence of the B0856 code.

10. Will fixing the Memory Seat Module 5 Volt Reference Out of Range code (B0856) affect the overall resale value of my Chevrolet?

- Maintaining and repairing electrical issues like the B0856 code can help preserve the overall condition and value of your Chevrolet when it comes to resale or trade-in.

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