AutoCodes – Generic – B2854

B2854 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 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 1,291

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

What does this mean?

What are the Possible Causes of the DTC B2854?

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?

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 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 B2854 code?

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

Need Help with the Code?

Get the B2854 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2854 Chrysler — Implausible Data Received From AHBM
B2854 Dodge — Implausible Data Received From AHBM
B2854 Jeep — Implausible Data Received From AHBM
B2854 RAM — Implausible Data Received From AHBM

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 Code

1. What are the common symptoms of OBDII code B2854?

- Common symptoms include malfunction of the AHBM (Active Hood Bonnet Mechanism), illuminated dashboard warning light, and potential inability to open or close the hood electronically.

2. What can cause the OBDII code B2854 to trigger?

- This code is usually triggered when the control module receives implausible data from the AHBM, indicating a communication error or malfunction within the system.

3. How can I diagnose the issue related to code B2854?

- Diagnosis typically involves using a diagnostic scan tool to retrieve the specific fault codes, inspecting the AHBM components for physical damage or wiring issues, and testing the system for proper functionality.

4. Is it safe to drive with OBDII code B2854 active?

- While the vehicle may still be operable, it is not recommended to drive with this code active as it can affect the proper functioning of the hood mechanism and potentially compromise safety in the event of an accident.

5. What are some DIY repair tips for OBDII code B2854?

- DIY repair options include checking and cleaning the electrical connectors of the AHBM, ensuring proper wiring connections, and resetting the fault codes to see if the issue resolves.

6. Can OBDII code B2854 be a recurring problem?

- Yes, if the underlying issue causing the code is not properly diagnosed and repaired, it can recur intermittently, leading to persistent problems with the AHBM system.

7. How much does it typically cost to repair OBDII code B2854 at a mechanic?

- Repair costs can vary depending on the exact cause of the issue, but expect to pay anywhere from $100 to $300 for diagnosis and repair of the AHBM system.

8. Can a faulty hood switch trigger OBDII code B2854?

- Yes, a faulty hood switch can sometimes cause communication errors with the AHBM system, leading to the triggering of OBDII code B2854.

9. Is it necessary to replace the AHBM unit when dealing with code B2854?

- Not always. In some cases, the issue may be resolved by addressing wiring problems, sensor malfunctions, or communication errors without the need for a full AHBM replacement.

10. How long does it typically take to repair OBDII code B2854?

- Depending on the complexity of the issue and the availability of parts, repairing OBDII code B2854 can take anywhere from a few hours to a full day at the mechanic's shop.