AutoCodes – Generic – B1BC8

B1BC8 Code - Passenger Seat Weight Sensor Performance

Quick Answer

While the CAN bus ignition status is in IGN-RUN, the module checks the sensor input ranges. Common causes include Faulty Passenger Seat Weight Sensor, Passenger Seat Weight Sensor harness is open or shorted, Passenger Seat Weight Sensor 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: B1BC8 indicates Passenger Seat Weight Sensor Performance.
Common causes: Common causes include Faulty Passenger Seat Weight Sensor, Passenger Seat Weight Sensor harness is open or shorted, Passenger Seat Weight Sensor 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 941

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Aug 23, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1BC8 Description

While the CAN bus ignition status is in IGN-RUN, the module checks the sensor input ranges. This code will set if the Occupant Classification Module (OCM) detects the difference between 2 sensors is less than 3 A/D (15 mV) counts for 10 consecutive minutes while at least one sensor count is changing and greater than 8 A/D (40 mV) counts.

OBDII Code B1BC8 - Passenger Seat Weight Sensor Performance - AutoCodes.com — B1BC8 Code - Passenger Seat Weight Sensor Performance

What does this mean?

What are the Possible Causes of the DTC B1BC8?

Faulty Passenger Seat Weight Sensor
Passenger Seat Weight Sensor harness is open or shorted
Passenger Seat Weight Sensor circuit poor electrical connection
Faulty Occupant Classification Module (OCM)

How to Fix the DTC B1BC8?

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 B1BC8 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 B1BC8 code?

Need more information on how to fix the B1BC8 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1BC8 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1BC8 Chrysler — Passenger Seat Weight Sensor Performance
B1BC8 Dodge — Passenger Seat Weight Sensor Performance
B1BC8 Jeep — Passenger Seat Weight Sensor Performance
B1BC8 Mitsubishi — Passenger Seat Weight Sensor Performance
B1BC8 RAM — Passenger Seat Weight Sensor Performance

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 B1BC8 Code

1. What are the common symptoms of OBDII code B1BC8 (Passenger Seat Weight Sensor Performance)?

- The common symptoms include the airbag warning light staying illuminated on the dashboard and the passenger airbag potentially being disabled.

2. What usually causes the OBDII code B1BC8 to trigger?

- This code is typically triggered by issues with the passenger seat weight sensor, such as sensor malfunctions, wiring problems, or sensor calibration errors.

3. Can a faulty passenger seat weight sensor be repaired, or does it need to be replaced?

- In some cases, the sensor may need recalibration or wiring repairs to fix the issue. However, if the sensor itself is faulty, it may require replacement.

4. How critical is it to address the OBDII code B1BC8 related to the passenger seat weight sensor?

- It is crucial to address this issue promptly as it affects the proper functioning of the passenger airbag system, which is a key safety feature in the vehicle.

5. Are there any DIY tips for troubleshooting the OBDII code B1BC8 at home?

- DIY troubleshooting tips may include checking the wiring connections to the sensor, ensuring the sensor is securely in place, and attempting to recalibrate the sensor if possible.

6. Can driving with the OBDII code B1BC8 present cause any safety risks?

- Driving with this code present may pose safety risks as the passenger airbag may not deploy correctly in the event of a collision, potentially endangering the passenger.

7. How can a mechanic diagnose the root cause of the OBDII code B1BC8 accurately?

- A mechanic can use specialized diagnostic tools to read the code, inspect the passenger seat weight sensor and its wiring, perform sensor calibration tests, and conduct further troubleshooting as needed.

8. Is it necessary to reset the OBDII code B1BC8 after fixing the underlying issue?

- Yes, it is recommended to reset the code after addressing the problem to clear the fault code and ensure the proper functioning of the airbag system.

9. Are there any recalls or technical service bulletins related to the OBDII code B1BC8 in certain vehicle models?

- It is advisable to check with the vehicle manufacturer or authorized dealerships for any recalls or technical service bulletins related to this specific OBDII code in your vehicle.

10. What should I do if I continue to experience issues with the passenger seat weight sensor after attempted repairs?

- If issues persist even after attempted repairs, it is recommended to seek professional assistance from a certified mechanic or dealership to diagnose and resolve the problem accurately.