AutoCodes – Generic – B1B55

B1B55 Code - 1st Row Passenger Seat Belt Sensor Circuit High

Quick Answer

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Passenger Seat Belt Buckle Switch circuits every 100 ms to verify the integrity of the switch and wiring. Common causes include Faulty Passenger Seat Belt Buckle Switch, Passenger Seat Belt Buckle Switch harness is open or shorted, Passenger Seat Belt Buckle Switch 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: B1B55 indicates 1st Row Passenger Seat Belt Sensor Circuit High.
Common causes: Common causes include Faulty Passenger Seat Belt Buckle Switch, Passenger Seat Belt Buckle Switch harness is open or shorted, Passenger Seat Belt Buckle Switch 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 4,003

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 Aug 21, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1B55 Description

When powered, the Occupant Restraint Controller (ORC) sends a test current across the Passenger Seat Belt Buckle Switch circuits every 100 ms to verify the integrity of the switch and wiring. The front seat belt switches cannot be adjusted or repaired and, if ineffective or damaged, the entire front seat belt buckle-half unit must be replaced. The airbag warning lamp will display in the instrument cluster for this fault. The ORC monitors the switch input current ranges at power up and continuously every 100ms with the ignition in on.

OBDII Code B1B55 - 1st Row Passenger Seat Belt Sensor Circuit High - AutoCodes.com — B1B55 Code - 1st Row Passenger Seat Belt Sensor Circuit High

What does this mean?

What are the Possible Causes of the DTC B1B55?

Faulty Passenger Seat Belt Buckle Switch
Passenger Seat Belt Buckle Switch harness is open or shorted
Passenger Seat Belt Buckle Switch circuit poor electrical connection
Faulty Occupant Restraint Controller (ORC)

How to Fix the DTC B1B55?

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 B1B55 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 B1B55 code?

Need more information on how to fix the B1B55 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B55 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1B55 Chrysler — 1st Row Passenger Seat Belt Sensor Circuit High
B1B55 Dodge — 1st Row Passenger Seat Belt Sensor Circuit High
B1B55 Fiat — 1st Row Passenger Seat Belt Sensor Circuit High
B1B55 Jeep — 1st Row Passenger Seat Belt Sensor Circuit High
B1B55 Mitsubishi — 1st Row Passenger Seat Belt Sensor Circuit High
B1B55 RAM — 1st Row Passenger Seat Belt Sensor Circuit High

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 B1B55 Code

1. What are the common symptoms of OBDII code B1B55 (1st Row Passenger Seat Belt Sensor Circuit High)?

The common symptoms include the airbag warning light illuminating on the dashboard and a potential disabling of the passenger airbag system.

2. What are the possible causes of OBDII code B1B55?

Possible causes of this code include a faulty seat belt sensor, damaged wiring in the seat belt sensor circuit, or a problem with the airbag control module.

3. How can I diagnose the issue related to OBDII code B1B55?

Diagnosing the problem may involve using a diagnostic scanner to read the code, inspecting the seat belt sensor and its wiring for damage, and testing the airbag control module for proper functioning.

4. Can I continue driving my vehicle with OBDII code B1B55 present?

It is not recommended to drive the vehicle with this code active, as it may indicate a potential safety issue with the passenger airbag system.

5. How can I repair OBDII code B1B55 (1st Row Passenger Seat Belt Sensor Circuit High)?

Repairing this code may involve replacing the faulty seat belt sensor, repairing damaged wiring, or reprogramming the airbag control module to clear the code.

6. Is it safe to reset the OBDII code B1B55 without addressing the underlying issue?

Resetting the code without fixing the root cause may temporarily turn off the warning light, but the issue will likely reappear, potentially compromising passenger safety.

7. Can a DIY enthusiast fix OBDII code B1B55 at home?

Depending on the skill level and equipment available, some DIY enthusiasts may be able to address this code by replacing the seat belt sensor or repairing the wiring themselves.

8. How much does it typically cost to repair OBDII code B1B55 at a professional auto repair shop?

The cost of repairing this code can vary depending on the extent of the issue and the labor rates of the repair shop, but it may range from $100 to $500 or more.

9. Are there any preventive measures to avoid OBDII code B1B55 in the future?

Regularly inspecting and maintaining the seat belt sensor and associated wiring, as well as following proper seat belt usage guidelines, can help prevent issues leading to this OBDII code.

10. Will OBDII code B1B55 cause my vehicle to fail an emissions test?

This code is related to the airbag system and not emissions, so it should not cause your vehicle to fail an emissions test. However, it is important to address the issue promptly for safety reasons.