B1B55 RAM 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 RAM 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.
Code B1B55 RAM Description
What are the Possible Causes of the DTC B1B55 RAM?
- 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 RAM?
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 RAM 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 RAM code?
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Need Help with the Code?
Get the B1B55 RAM 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.
Frequently Asked Questions about B1B55 RAM Code
1. What does the OBDII code B1B55 mean?
The code B1B55 indicates a problem with the 1st row passenger seat belt sensor circuit, specifically that it is reading a high voltage condition.
2. What are the common symptoms of the B1B55 code?
Common symptoms include the airbag warning light being illuminated, passenger seat belt reminders not functioning correctly, or intermittent chimes when the seat belt is fastened.
3. What causes the B1B55 code to appear?
This code can be caused by a faulty seat belt sensor, damaged wiring or connectors, a short or open circuit in the seat belt sensor circuit, or a malfunctioning occupant classification system (OCS).
4. Is it safe to drive with the B1B55 code active?
Driving with this code may compromise the functionality of the passenger airbag system. It is best to have it diagnosed and repaired promptly.
5. How is the B1B55 code diagnosed?
Technicians will inspect the seat belt sensor, wiring, and connectors for damage, test the circuit for high resistance, and use a scan tool to verify the fault and clear the code after repairs.
6. Can a loose seat belt connector cause the B1B55 code?
Yes, a loose or disconnected seat belt connector can trigger this code by disrupting the circuit's proper operation.
7. What repairs can fix the B1B55 code?
Repairs may include replacing the seat belt sensor, repairing or replacing damaged wiring or connectors, or re-calibrating the occupant classification system if needed.
8. How much does it cost to fix the B1B55 code?
The repair cost varies depending on the issue, but typically ranges from $100 to $300 for diagnostics and parts replacement.
9. Can I fix the B1B55 code myself?
If you are experienced with automotive electrical systems, you can check and repair wiring or connectors. Otherwise, it is recommended to consult a professional.
10. Will clearing the code with a scan tool solve the problem?
Clearing the code without addressing the underlying issue will only temporarily hide the problem, and the code is likely to reappear.
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