AutoCodes – Fiat – B1B55 Fiat

B1B55 Fiat 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 Fiat 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 1,015

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
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1B55 Fiat 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 Fiat - 1st Row Passenger Seat Belt Sensor Circuit High - AutoCodes.com — B1B55 Fiat Code - 1st Row Passenger Seat Belt Sensor Circuit High

What does this mean?

What are the Possible Causes of the DTC B1B55 Fiat?

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 Fiat?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1B55 Fiat 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 Fiat code?

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

Need Help with the Code?

Get the B1B55 Fiat 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 Fiat Code

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

The common symptoms include the airbag warning light staying illuminated on the dashboard and potential deactivation of the passenger airbag.

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

The code B1B55 typically indicates a high circuit in the 1st Row Passenger Seat Belt Sensor, which can be caused by a faulty sensor, damaged wiring, or a poor connection.

3. How can I diagnose the issue causing OBDII code B1B55 in my Fiat?

To diagnose the issue, you can use an OBDII scanner to read the specific fault code, visually inspect the seat belt sensor and wiring for any visible damage, and test the sensor's resistance using a multimeter.

4. Can I still drive my Fiat with OBDII code B1B55 present?

It is not recommended to drive the vehicle with an active airbag fault code like B1B55, as the passenger airbag may not deploy in case of an accident. It is advised to address the issue promptly.

5. Are there any DIY repair tips for fixing OBDII code B1B55 in a Fiat?

DIY repair tips include checking and securing the sensor's wiring connections, ensuring the sensor is properly aligned and functioning, and resetting the fault code using an OBDII scanner after any repairs.

6. What is the typical cost to repair OBDII code B1B55 in a Fiat at a dealership or repair shop?

The cost to repair OBDII code B1B55 can vary depending on the cause of the issue. Typically, it may involve sensor replacement, wiring repairs, or resetting the system, with costs ranging from $100 to $500 or more.

7. Can I reset OBDII code B1B55 in my Fiat without fixing the underlying issue?

While you can clear the fault code temporarily using an OBDII scanner, it is not recommended to do so without addressing the root cause, as the issue may persist and pose a safety risk.

8. Is OBDII code B1B55 related to the passenger seat belt pretensioner in a Fiat?

No, OBDII code B1B55 specifically relates to the 1st Row Passenger Seat Belt Sensor Circuit High and does not directly involve the pretensioner function. The sensor measures seat belt usage and occupancy.

9. How long does it typically take to repair OBDII code B1B55 in a Fiat?

The repair time for OBDII code B1B55 can vary depending on the exact cause of the issue and the complexity of the repair. In most cases, it may take anywhere from 1 to 3 hours to diagnose and fix the problem.

10. Is it safe to attempt a DIY repair of OBDII code B1B55 in a Fiat, or should I seek professional help?

While some DIY repairs are possible for OBDII code B1B55, it is recommended to seek professional help if you are not experienced with automotive electrical systems to ensure the issue is properly diagnosed and repaired for safety reasons.