AutoCodes – Mitsubishi – B1B55 Mitsubishi

B1B55 Mitsubishi 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 Mitsubishi 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 671

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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

What does this mean?

What are the Possible Causes of the DTC B1B55 Mitsubishi?

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 Mitsubishi?

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 Mitsubishi 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 Mitsubishi code?

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

Need Help with the Code?

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

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 Mitsubishi Code

1. What are common symptoms of the OBDII code B1B55 in a Mitsubishi related to the 1st Row Passenger Seat Belt Sensor Circuit High?

- Common symptoms include the airbag warning light staying on, the passenger airbag not deploying in an accident, and potential issues with the seat belt reminder system.

2. What can cause the 1st Row Passenger Seat Belt Sensor Circuit High code B1B55 in a Mitsubishi?

- Possible causes include a faulty seat belt sensor, damaged wiring or connectors in the seat belt system, or a malfunctioning airbag control module.

3. How can I diagnose the 1st Row Passenger Seat Belt Sensor Circuit High issue in my Mitsubishi?

- Diagnosing this issue typically involves using an OBDII scanner to read the specific B1B55 code, performing visual inspections of the seat belt sensor and related components, and testing the sensor's electrical connections.

4. Are there any safety concerns associated with the B1B55 code related to the 1st Row Passenger Seat Belt Sensor Circuit High?

- Yes, there are safety concerns as the passenger airbag may not deploy correctly in the event of a crash if the seat belt sensor circuit is compromised.

5. Can I repair the B1B55 code related to the 1st Row Passenger Seat Belt Sensor Circuit High on my own?

- Repairing this issue may require technical expertise, so it is recommended to consult a qualified mechanic or dealership to accurately diagnose and repair the problem.

6. Is it safe to drive my Mitsubishi with the B1B55 code indicating a problem with the 1st Row Passenger Seat Belt Sensor Circuit High?

- It is not advisable to drive the vehicle with this issue unresolved, as it may compromise the effectiveness of the passenger airbag system in the event of an accident.

7. How much does it typically cost to repair the B1B55 code in a Mitsubishi related to the 1st Row Passenger Seat Belt Sensor Circuit High?

- The cost of repair can vary depending on the specific cause of the issue, but it may involve replacing the seat belt sensor, repairing wiring, or reprogramming the airbag control module.

8. Can resetting the OBDII code B1B55 related to the 1st Row Passenger Seat Belt Sensor Circuit High fix the problem?

- Resetting the code may temporarily turn off the warning light, but it will not address the underlying issue causing the high circuit in the passenger seat belt sensor.

9. Are there any recalls or technical service bulletins related to the B1B55 code in Mitsubishi vehicles?

- It is recommended to check with Mitsubishi or authorized dealerships for any relevant recalls or technical service bulletins related to the 1st Row Passenger Seat Belt Sensor Circuit High code.

10. How can I prevent the B1B55 code related to the 1st Row Passenger Seat Belt Sensor Circuit High from occurring in my Mitsubishi?

- Regularly inspecting and maintaining the seat belt system, avoiding any modifications to the airbag system, and addressing any issues promptly can help prevent the occurrence of this code.