B1B28 RAM Code - 1st Row Driver Seat Belt Pretensioner Circuit Low
Quick Answer
The Occupant Restraint Controller (ORC) monitors the 1st Row Driver Seat Belt Pretensioner Circuit. Common causes include Faulty Driver Seat Belt Pretensioner, Driver Seat Belt Pretensioner harness is open or shorted, Driver Seat Belt Pretensioner 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
- B1B28 RAM indicates 1st Row Driver Seat Belt Pretensioner Circuit Low.
- Common causes
- Common causes include Faulty Driver Seat Belt Pretensioner, Driver Seat Belt Pretensioner harness is open or shorted, Driver Seat Belt Pretensioner 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 B1B28 RAM Description
What are the Possible Causes of the DTC B1B28 RAM?
- Faulty Driver Seat Belt Pretensioner
- Driver Seat Belt Pretensioner harness is open or shorted
- Driver Seat Belt Pretensioner circuit poor electrical connection
- Faulty Occupant Restraint Controller (ORC)
How to Fix the DTC B1B28 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 B1B28 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.
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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.
Frequently Asked Questions about B1B28 RAM Code
1. What does OBDII code B1B28 mean?
Code B1B28 refers to a fault in the 1st Row Driver Seat Belt Pretensioner Circuit, indicating a low voltage or resistance issue.
2. What are the common symptoms of code B1B28?
Typical symptoms include an illuminated airbag warning light, seat belt pretensioner not functioning during a collision, and potential safety system deactivation.
3. What causes code B1B28 to appear?
The primary causes include damaged wiring, a faulty seat belt pretensioner, corroded connectors, or an issue with the airbag control module.
4. Is it safe to drive with code B1B28?
Driving with this code is not recommended, as it may compromise the vehicle’s safety systems, including the effectiveness of seat belts and airbags.
5. How do I diagnose code B1B28?
Start by inspecting the seat belt pretensioner wiring and connectors for damage or corrosion. Use a diagnostic tool to check resistance levels and confirm the fault.
6. Can a blown fuse cause code B1B28?
Yes, a blown fuse in the airbag or pretensioner circuit may result in this code being triggered.
7. How is code B1B28 fixed?
Repairs may include replacing the seat belt pretensioner, repairing damaged wiring, cleaning corroded connectors, or resetting the airbag control module.
8. How much does it cost to fix code B1B28?
The cost can vary, but replacing the seat belt pretensioner typically ranges from $150 to $300, plus labor.
9. Can code B1B28 clear itself?
No, this code usually requires the underlying issue to be resolved and the fault code cleared with a diagnostic tool.
10. What tools are needed to troubleshoot code B1B28?
You’ll need a multimeter to check resistance, a diagnostic scanner to read and clear codes, and basic tools for inspecting wiring and connectors.
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