AutoCodes – Mitsubishi – B1B79 Mitsubishi

B1B79 Mitsubishi Code - Passenger Seat Weight Sensor 3 Left Front Input Circuit Low

Quick Answer

If the module detects that the sensor input is less than 3.4 +/- 0.6% of the Seat Weight Sensor 5 Volt circuit voltage. Common causes include Faulty Left Front Passenger Seat Weight Sensor, Left Front Passenger Seat Weight Sensor harness is open or shorted, Left Front 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: B1B79 Mitsubishi indicates Passenger Seat Weight Sensor 3 Left Front Input Circuit Low.
Common causes: Common causes include Faulty Left Front Passenger Seat Weight Sensor, Left Front Passenger Seat Weight Sensor harness is open or shorted, Left Front 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 887

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 B1B79 Mitsubishi Description

If the module detects that the sensor input is less than 3.4 +/- 0.6% of the Seat Weight Sensor 5 Volt circuit voltage. This Diagnostic Trouble Code (DTC) will also set if the Seat Weight Sensor 5 Volt circuit is shorted to ground. However, this condition would prevent communication with the Occupant Classification Module (OCM) and cause a Lost Communication With OCM DTC to set in other modules. Also, this DTC will remain active after the condition that set this fault is no longer present. This condition is referred to as latching the DTC for the ignition cycle. Cycling the ignition key will change the status from active to stored if the condition that set the fault is no longer present.

OBDII Code B1B79 Mitsubishi - Passenger Seat Weight Sensor 3 Left Front Input Circuit Low - AutoCodes.com — B1B79 Mitsubishi Code - Passenger Seat Weight Sensor 3 Left Front Input Circuit Low

What does this mean?

What are the Possible Causes of the DTC B1B79 Mitsubishi?

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

How to Fix the DTC B1B79 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 B1B79 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 B1B79 Mitsubishi code?

Need more information on how to fix the B1B79 Mitsubishi code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B79 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 B1B79 Mitsubishi Code

1. What are common symptoms of OBDII code B1B79 in a Mitsubishi related to the passenger seat weight sensor?

The common symptoms include the airbag warning light illuminating on the dashboard and potential issues with the passenger airbag system.

2. What does the OBDII code B1B79 indicate in a Mitsubishi?

The code B1B79 indicates a fault with the Passenger Seat Weight Sensor 3 Left Front Input Circuit being low in the vehicle.

3. What are possible causes of the OBDII code B1B79 in a Mitsubishi?

Possible causes include a malfunctioning passenger seat weight sensor, damaged wiring or connectors, or a faulty airbag control module.

4. How can I diagnose the issue related to the OBDII code B1B79 in my Mitsubishi?

Diagnosis typically involves using an OBDII scanner to retrieve the specific fault code, checking the passenger seat weight sensor and its connections, and inspecting the wiring for any visible damage.

5. Can I continue driving my Mitsubishi with the OBDII code B1B79 present?

It is not recommended to drive the vehicle with the B1B79 code active, as it indicates a potential issue with the passenger airbag system, which could affect its proper functioning in case of an accident.

6. How can I reset the OBDII code B1B79 in my Mitsubishi after repairing the issue?

Once the underlying issue has been fixed, the code can be cleared using an OBDII scanner or by disconnecting the vehicle's battery for a few minutes to reset the system.

7. Is it safe to repair the OBDII code B1B79 related to the passenger seat weight sensor on my own?

While some basic troubleshooting steps can be taken by DIY enthusiasts, it is recommended to have the issue diagnosed and repaired by a qualified mechanic or dealership to ensure proper functioning of the airbag system.

8. Will fixing the OBDII code B1B79 in my Mitsubishi be costly?

The cost of repairing the B1B79 code can vary depending on the exact cause of the issue, the parts needed for replacement, and the labor charges. It is advisable to get a few quotes from different mechanics or dealerships.

9. Are there any preventive measures to avoid the OBDII code B1B79 from recurring in my Mitsubishi?

Regularly inspecting and maintaining the passenger seat weight sensor and its connections, avoiding placing heavy objects on the passenger seat, and driving carefully to prevent sudden impacts can help reduce the chances of the code reoccurring.

10. How important is it to address the OBDII code B1B79 in a timely manner in my Mitsubishi?

It is crucial to address the B1B79 code promptly to ensure the proper functioning of the passenger airbag system in the vehicle, as any malfunction in this system can compromise the safety of occupants in case of a collision.