B1BBB RAM Code - Passenger Seat Weight Sensor Input Shorted Together
Quick Answer
While the CAN bus ignition status is in IGN-RUN. Common causes include Faulty Occupant Classification Module (OCM), Occupant Classification Module (OCM) harness is open or shorted, Occupant Classification Module (OCM) 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
- B1BBB RAM indicates Passenger Seat Weight Sensor Input Shorted Together.
- Common causes
- Common causes include Faulty Occupant Classification Module (OCM), Occupant Classification Module (OCM) harness is open or shorted, Occupant Classification Module (OCM) 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 B1BBB RAM Description
What are the Possible Causes of the DTC B1BBB RAM?
- Faulty Occupant Classification Module (OCM)
- Occupant Classification Module (OCM) harness is open or shorted
- Occupant Classification Module (OCM) circuit poor electrical connection
How to Fix the DTC B1BBB 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 B1BBB 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 B1BBB RAM Code
1. What does the OBDII code B1BBB mean?
The B1BBB code indicates an issue with the passenger seat weight sensor, specifically that the sensor's input signals are shorted together.
2. What are the common symptoms of a B1BBB code?
Symptoms may include the airbag warning light being illuminated, the passenger airbag being disabled, or improper airbag deployment in the event of a collision.
3. What causes the B1BBB code to appear?
Common causes include damaged wiring, corroded connectors, a faulty passenger seat weight sensor, or an issue with the airbag control module.
4. How can I diagnose the B1BBB code?
Use an OBDII scanner to confirm the code, then inspect the wiring and connectors under the passenger seat for damage or corrosion. Test the weight sensor for proper functionality if no visible issues are found.
5. Can I still drive my vehicle with the B1BBB code active?
While the car may still be drivable, the airbag system may not function correctly, potentially compromising passenger safety in a collision.
6. How do I fix the B1BBB code?
Repairs may involve replacing damaged wiring, cleaning or repairing corroded connectors, or replacing the faulty weight sensor. In some cases, reprogramming or replacing the airbag control module may be necessary.
7. How much does it cost to repair a B1BBB code?
Repair costs can vary widely, ranging from $50 for minor wiring fixes to over $500 if the weight sensor or airbag control module needs replacement.
8. Can I reset the B1BBB code without repairing the issue?
You can clear the code with an OBDII scanner, but if the underlying problem isn’t fixed, the code and symptoms will likely return.
9. Is the B1BBB code covered under warranty?
This depends on your vehicle’s warranty terms. Airbag-related components often have extended coverage, so it’s worth checking with your dealership.
10. Can a B1BBB code cause the airbag system to malfunction?
Yes, this code can prevent the airbag system from detecting passenger presence accurately, leading to improper airbag deployment or failure to deploy during an accident.
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