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B2855 Ford Code - Crash Zone Sensor Circuit Short

Quick Answer

The B2855 Ford code indicates a crash zone sensor circuit short in the vehicle's system. Common causes include Wiring damage or corrosion in the crash zone sensor circuit, Faulty crash zone sensor, Short circuit in the crash zone sensor circuit. 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 Ford indicates Crash Zone Sensor Circuit Short.
Common causes
Common causes include Wiring damage or corrosion in the crash zone sensor circuit, Faulty crash zone sensor, Short circuit in the crash zone sensor circuit.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 17, 2024
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Code B2855 Ford Description

The B2855 Ford code indicates a crash zone sensor circuit short in the vehicle's system. Crash zone sensors are crucial components of a vehicle's safety system, as they are responsible for detecting impacts and deploying airbags to protect occupants in the event of a collision. When this code is triggered, it means that there is a short circuit in the circuit that connects the crash zone sensor to the vehicle's main computer.

OBDII Code B2855 Ford - Crash Zone Sensor Circuit Short
B2855 Ford Code - Crash Zone Sensor Circuit Short

Common Causes of B2855 Ford

  1. Wiring damage or corrosion in the crash zone sensor circuit
  2. Faulty crash zone sensor
  3. Short circuit in the crash zone sensor circuit
  4. Issues with the vehicle's main computer
  5. Impact damage to the crash zone sensor

Symptoms of B2855 Ford

  1. Airbag warning light illuminated on the dashboard
  2. Inability to deploy airbags in a collision
  3. Faulty seatbelt pretensioners
  4. Malfunctioning side curtain airbags

How to Fix B2855 Ford

  1. Begin by diagnosing the specific cause of the crash zone sensor circuit short using a diagnostic scanner to read the trouble codes and pinpoint the issue.
  2. Inspect the wiring harness and connections for any signs of damage, corrosion, or loose connections. Repair or replace any damaged wiring.
  3. Test the crash zone sensor itself to determine if it is functioning properly. Replace the sensor if necessary.
  4. Check the vehicle's main computer for any issues that may be causing the short circuit. Repair or replace the computer as needed.
  5. Clear the trouble codes from the vehicle's system and test the crash zone sensor circuit to ensure that the issue has been resolved.

Cost to Fix B2855 Ford

The cost of repairing a crash zone sensor circuit short can vary depending on the specific cause of the issue and the extent of the damage. On average, the repair costs for this issue can range from $200 to $500, including parts and labor. However, it's important to note that diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check with local auto repair shops for a more accurate estimate.

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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 Ford Code

1. What are the common symptoms of OBDII code B2855 on a Ford vehicle?

- Common symptoms include the airbag warning light staying on, erratic airbag deployment, or complete airbag system failure.

2. What can cause the OBDII code B2855 Crash Zone Sensor Circuit Short on a Ford?

- This code is typically triggered by a short circuit in the crash zone sensor circuit, which could be caused by damaged wiring, a faulty sensor, or a problem with the airbag control module.

3. How serious is the OBDII code B2855 on a Ford vehicle?

- This code indicates a potential issue with the airbag system, which is a critical safety component in the vehicle. It is important to address this issue promptly to ensure the airbags function properly in the event of a collision.

4. How can I diagnose the OBDII code B2855 Crash Zone Sensor Circuit Short on my Ford?

- Diagnosing this code usually requires a scan tool to read the specific fault codes and potentially some electrical testing to pinpoint the exact location of the short circuit.

5. Can I still drive my Ford with the OBDII code B2855 present?

- It is not recommended to drive the vehicle with this code present, as it indicates a problem with the airbag system that could potentially affect its performance during a collision.

6. How can I repair the OBDII code B2855 on my Ford?

- Repairing this code typically involves locating and fixing the short circuit in the crash zone sensor circuit. This may require repairing or replacing damaged wiring, sensors, or the airbag control module.

7. Is it possible to reset the OBDII code B2855 on a Ford without fixing the issue?

- While you can clear the code with a scan tool, it is not recommended to do so without addressing the underlying issue, as it could compromise the safety of the airbag system.

8. How much does it cost to repair the OBDII code B2855 on a Ford?

- The cost of repair can vary depending on the extent of the damage and the specific components that need to be replaced. It is advisable to consult a professional mechanic for an accurate estimate.

9. Can the OBDII code B2855 be intermittent or come back after being cleared?

- Yes, this code can sometimes be intermittent, especially if the short circuit is caused by a loose connection. It is important to thoroughly diagnose and repair the issue to prevent it from recurring.

10. Are there any safety precautions I should take if the OBDII code B2855 appears on my Ford?

- If this code appears, it is important to exercise caution and have the airbag system inspected by a qualified technician as soon as possible to ensure the safety of the vehicle occupants.

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