AutoCodes – Mitsubishi – B1B89 Mitsubishi

B1B89 Mitsubishi Code - Passenger Seat Weight Sensor 1 Right Rear Input Circuit High

Quick Answer

If the module detects that the sensor input is greater than 96 +/- 0.6% of the Seat Weight Sensor 5 Volt circuit voltage. Common causes include Faulty Right Rear Passenger Seat Weight Sensor, Right Rear Passenger Seat Weight Sensor harness is open or shorted, Right Rear 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: B1B89 Mitsubishi indicates Passenger Seat Weight Sensor 1 Right Rear Input Circuit High.
Common causes: Common causes include Faulty Right Rear Passenger Seat Weight Sensor, Right Rear Passenger Seat Weight Sensor harness is open or shorted, Right Rear 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 758

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 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1B89 Mitsubishi Description

If the module detects that the sensor input is greater than 96 +/- 0.6% of the Seat Weight Sensor 5 Volt circuit voltage. Note that this Diagnostic Trouble Code (DTC) will remain active after the condition that set this fault is no longer present. Performing the Occupant Classification Module (OCM) System Verification Test will change the status from active to stored if the condition that set the fault is no longer present.

OBDII Code B1B89 Mitsubishi - Passenger Seat Weight Sensor 1 Right Rear Input Circuit High - AutoCodes.com — B1B89 Mitsubishi Code - Passenger Seat Weight Sensor 1 Right Rear Input Circuit High

What does this mean?

What are the Possible Causes of the DTC B1B89 Mitsubishi?

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

How to Fix the DTC B1B89 Mitsubishi?

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 B1B89 Mitsubishi 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 B1B89 Mitsubishi code?

Need more information on how to fix the B1B89 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B89 Mitsubishi 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 B1B89 Mitsubishi Code

1. What are the common symptoms of OBDII code B1B89 in a Mitsubishi related to the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High?

The common symptoms include the airbag warning light illuminating on the dashboard and the passenger airbag system being disabled.

2. What could cause the OBDII code B1B89 in a Mitsubishi related to the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High?

The code B1B89 can be triggered by a damaged seat weight sensor, wiring issues, or a faulty airbag control module.

3. How can I diagnose the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High issue in my Mitsubishi?

You can diagnose the issue by using an OBDII scanner to read the specific trouble code, inspecting the wiring and connections related to the right rear seat weight sensor, and testing the sensor itself for proper functionality.

4. Can I continue driving my Mitsubishi with the OBDII code B1B89 related to the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High?

It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the passenger airbag system, which may not deploy in case of an accident.

5. How can I repair the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High problem in my Mitsubishi?

To repair the issue, you may need to replace the right rear seat weight sensor, repair any damaged wiring or connections, or reprogram the airbag control module to clear the trouble code.

6. Are there any DIY tips for troubleshooting the OBDII code B1B89 related to the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High?

You can start by checking the wiring harness for any visible damage, ensuring all connections are secure, and resetting the trouble code with an OBDII scanner to see if it returns.

7. How much does it typically cost to fix the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High issue in a Mitsubishi?

The cost of repairing this issue can vary depending on the exact cause, but it may range from $200 to $500 for parts and labor at a dealership or repair shop.

8. Can a faulty Passenger Seat Weight Sensor 1 Right Rear Input Circuit High impact the overall safety of my Mitsubishi?

Yes, a faulty sensor related to the passenger airbag system can compromise the overall safety of the vehicle, especially in the event of a collision where the airbags may not deploy as intended.

9. Is it possible to bypass or disable the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High system in my Mitsubishi?

It is not recommended to bypass or disable any safety systems related to airbags, as it can pose a risk to the occupants in case of an accident.

10. How can I prevent the recurrence of the OBDII code B1B89 related to the Passenger Seat Weight Sensor 1 Right Rear Input Circuit High in my Mitsubishi?

Regularly inspecting and maintaining the seat weight sensors, wiring, and airbag system components can help prevent the recurrence of this trouble code.