AutoCodes – Generic – B2855

B2855 Code - Crash Zone Sensor Circuit Short

Quick Answer

The Air Bag Control Module monitors the Front Crash Sensor. Common causes include Faulty Front Crash Sensor, Front Crash Sensor harness is open or shorted, Front Crash Sensor 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: B2855 indicates Crash Zone Sensor Circuit Short.
Common causes: Common causes include Faulty Front Crash Sensor, Front Crash Sensor harness is open or shorted, Front Crash Sensor 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 1,185

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 B2855 Description

The Air Bag Control Module monitors the Front Crash Sensor. The Air Bag Control Module sets the OBDII code when the Front Crash Sensor is not to factory specifications.

OBDII Code B2855 - Crash Zone Sensor Circuit Short - AutoCodes.com — B2855 Code - Crash Zone Sensor Circuit Short

What does this mean?

What are the Possible Causes of the DTC B2855?

Faulty Front Crash Sensor
Front Crash Sensor harness is open or shorted
Front Crash Sensor circuit poor electrical connection
Faulty Air Bag Control Module

How to Fix the DTC B2855?

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 B2855 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 B2855 code?

Need more information on how to fix the B2855 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B2855 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B2855 Ford — Crash Zone Sensor Circuit Short
B2855 Lincoln — Crash Zone Sensor Circuit Short
B2855 Mazda — Crash Zone Sensor Circuit Short
B2855 Mercury — Crash Zone Sensor Circuit Short

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B2855 Code

1. What are the common symptoms of OBDII code B2855 (Crash Zone Sensor Circuit Short)?

- The common symptoms of this code may include the airbag warning light illuminating on the dashboard, the airbag system not deploying in a crash, and potential diagnostic trouble codes related to the crash zone sensor circuit.

2. What are the possible causes of OBDII code B2855?

- Possible causes of this code include a short circuit in the crash zone sensor circuit, damaged wiring or connectors in the airbag system, a malfunctioning crash zone sensor, or a faulty airbag control module.

3. How can I diagnose OBDII code B2855?

- Diagnosing this code typically involves using a professional OBDII scan tool to read the fault codes, conducting a visual inspection of the airbag system components for any visible damage, and performing electrical tests to check for continuity and shorts in the crash zone sensor circuit.

4. What are the repair options for OBDII code B2855?

- Repair options for this code may include repairing or replacing damaged wiring or connectors, replacing the malfunctioning crash zone sensor, resetting the airbag system, or reprogramming the airbag control module if necessary.

5. Is it safe to drive with OBDII code B2855?

- It is not recommended to drive with this code present, as it indicates a potential issue with the airbag system, which is a critical safety component in a vehicle. It is advised to address the problem promptly to ensure the airbags function properly in the event of a crash.

6. Can I reset OBDII code B2855 myself?

- While you may be able to clear the fault code using an OBDII scan tool, it is important to address the underlying issue causing the code to prevent it from recurring. If the problem is not resolved, the code is likely to return.

7. How much does it cost to repair OBDII code B2855?

- The cost of repairing this code can vary depending on the specific cause of the issue, the extent of the damage, and whether any components need to be replaced. It is recommended to consult a professional mechanic for an accurate diagnosis and repair estimate.

8. How long does it take to repair OBDII code B2855?

- The repair time for this code can vary depending on the complexity of the issue and the availability of parts. Simple repairs like fixing wiring may take a shorter time, while replacing a sensor or module may require more labor.

9. Can OBDII code B2855 be intermittent?

- Yes, this code can sometimes be intermittent, meaning the issue may come and go. It is important to address intermittent codes promptly, as they can indicate underlying problems that need to be fixed to ensure the safety and functionality of the airbag system.

10. Will OBDII code B2855 cause my airbags to not deploy in a crash?

- Yes, if left unresolved, OBDII code B2855 can potentially cause the airbags not to deploy in a crash, as it indicates a fault in the crash zone sensor circuit, which is crucial for the proper functioning of the airbag system.