AutoCodes – Generic – B1B79

B1B79 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 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 1,229

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 22, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

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

What does this mean?

What are the Possible Causes of the DTC B1B79?

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?

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 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 code?

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

Need Help with the Code?

Get the B1B79 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1B79 Chrysler — Passenger Seat Weight Sensor 3 Left Front Input Circuit Low
B1B79 Dodge — Passenger Seat Weight Sensor 3 Left Front Input Circuit Low
B1B79 Jeep — Passenger Seat Weight Sensor 3 Left Front Input Circuit Low
B1B79 Mitsubishi — Passenger Seat Weight Sensor 3 Left Front Input Circuit Low
B1B79 RAM — Passenger Seat Weight Sensor 3 Left Front Input Circuit Low

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 Code

1. What are the common symptoms of OBDII code B1B79 related to the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

- Common symptoms include the airbag warning light illuminating on the dashboard, potential deactivation of the passenger airbag, and diagnostic trouble code B1B79 being stored.

2. What are the possible causes of OBDII code B1B79 indicating an issue with the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

- Possible causes can include a faulty weight sensor in the passenger seat, damaged wiring or connectors in the circuit, or a malfunctioning airbag control module.

3. How can I diagnose the issue related to OBDII code B1B79 on the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

- Diagnosis typically involves using a diagnostic scanner to retrieve the trouble code, checking the wiring and connectors for damage, and testing the weight sensor in the passenger seat for proper operation.

4. Is it safe to drive with OBDII code B1B79 triggered by an issue with the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

- It is recommended to address the underlying issue promptly to ensure the proper functioning of the passenger airbag system. Until the problem is resolved, the passenger airbag may be deactivated, so caution is advised.

5. Can I reset OBDII code B1B79 related to the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low on my own?

- While you can clear the trouble code temporarily with a diagnostic scanner, it is essential to diagnose and repair the root cause of the issue to prevent the code from reoccurring.

6. What are some repair tips for fixing OBDII code B1B79 associated with the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

- Repair tips may include checking and repairing any damaged wiring or connectors, recalibrating or replacing the weight sensor in the passenger seat, or resetting the airbag control module.

7. Will replacing the passenger seat resolve OBDII code B1B79 linked to the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

- While a faulty weight sensor in the passenger seat can be a common cause, it is recommended to diagnose the issue thoroughly before replacing any components to ensure an accurate and cost-effective repair.

8. How much does it typically cost to repair OBDII code B1B79 concerning the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

- Repair costs can vary depending on the underlying cause of the issue. It is advisable to consult a professional mechanic for a proper diagnosis and an accurate estimate of repair costs.