AutoCodes – RAM – B2854 RAM

B2854 RAM Code - Implausible Data Received From AHBM

Quick Answer

The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) receives incorrect information from the Automatic High Beam Module (AHBM). Common causes include Faulty Automatic High Beam Module (AHBM), Automatic High Beam Module (AHBM) harness is open or shorted, Automatic High Beam Module (AHBM) 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: B2854 RAM indicates Implausible Data Received From AHBM.
Common causes: Common causes include Faulty Automatic High Beam Module (AHBM), Automatic High Beam Module (AHBM) harness is open or shorted, Automatic High Beam Module (AHBM) 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.

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Code Popularity 2,036

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 Feb 17, 2020

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B2854 RAM Description

The Diagnostic Trouble Code (DTC) sets when the Body Control Module (BCM) receives incorrect information from the Automatic High Beam Module (AHBM).

OBDII Code B2854 RAM - Implausible Data Received From AHBM - AutoCodes.com — B2854 RAM Code - Implausible Data Received From AHBM

What does this mean?

What are the Possible Causes of the DTC B2854 RAM?

Faulty Automatic High Beam Module (AHBM)
Automatic High Beam Module (AHBM) harness is open or shorted
Automatic High Beam Module (AHBM) circuit poor electrical connection
Faulty Body Control Module (BCM)

How to Fix the DTC B2854 RAM?

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 B2854 RAM 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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Need more information on how to fix the B2854 RAM code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2854 RAM 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 B2854 RAM Code

1. What does the OBDII code B2854 RAM mean?

The B2854 code indicates "Implausible Data Received From AHBM," meaning the Active Headrest Bladder Module (AHBM) is sending data that the vehicle's system cannot interpret as valid.

2. What are the common symptoms of the B2854 code?

Symptoms may include the airbag warning light illuminating, issues with the active headrest system, or no noticeable changes in headrest functionality.

3. What causes the B2854 code to appear?

Common causes include faulty wiring or connectors in the AHBM circuit, a malfunctioning AHBM, or a software issue within the module.

4. Can I drive my vehicle with the B2854 code?

While it may be safe to drive, the active headrest system might not function properly in the event of an accident, reducing passenger safety.

5. How is the B2854 code diagnosed?

A technician will use a scan tool to verify the code, inspect the wiring and connectors in the AHBM circuit, and test the module for proper operation.

6. What repairs are typically needed for the B2854 code?

Repairs might include repairing or replacing damaged wiring, cleaning corroded connectors, updating AHBM software, or replacing the AHBM if it is defective.

7. How much does it cost to fix the B2854 code?

Repair costs vary but can range from $100 for minor wiring repairs to $500 or more if the AHBM needs replacement.

8. Can I fix the B2854 code myself?

If you are experienced with automotive electrical systems, you can inspect and repair wiring or connectors. However, for module replacement or software updates, professional help is recommended.

9. Will clearing the code solve the issue?

Clearing the code without addressing the underlying problem will only temporarily remove it, and the code is likely to return.

10. How can I prevent the B2854 code from recurring?

Regularly inspect and maintain the wiring and connectors in your vehicleâ€™s active headrest system, and address any issues promptly to prevent this code from reappearing.