AutoCodes – RAM – B1B79 RAM

B1B79 RAM 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 RAM 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 577

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

What does this mean?

What are the Possible Causes of the DTC B1B79 RAM?

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 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 B1B79 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.

Need more information about the B1B79 RAM code?

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

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Get the B1B79 RAM 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 RAM Code

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

The common symptoms include the airbag warning light staying illuminated on the dashboard, the passenger airbag system being disabled, and potential issues with the front passenger seatbelt reminder.

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

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

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

You can use an OBDII scanner to read and interpret the specific fault code B1B79 RAM. Additionally, conducting a visual inspection of the passenger seat wiring and connections can help identify any visible damage.

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

It is not recommended to drive the vehicle with this code present, as it indicates a potential issue with the passenger airbag system, which could compromise safety in the event of a collision.

5. What are the repair options for addressing OBDII code B1B79 RAM related to the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

Repair options may include replacing the faulty weight sensor in the passenger seat, repairing or replacing damaged wiring or connectors, or resetting the airbag control module to clear the fault code.

6. Can I reset OBDII code B1B79 RAM myself, or do I need to take my vehicle to a professional mechanic?

You may be able to reset the code using an OBDII scanner if you have the necessary knowledge and tools. However, if the underlying issue is not addressed, the code may reappear, so it's advisable to consult a professional mechanic for a thorough diagnosis and repair.

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

The cost of repair can vary depending on the specific cause of the issue. It may range from a few hundred dollars for sensor replacement to over a thousand dollars if extensive wiring repairs or module replacement are required.

8. Are there any DIY tips for troubleshooting OBDII code B1B79 RAM for the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low?

DIY tips may include checking for loose or damaged wiring under the passenger seat, ensuring all connectors are securely plugged in, and using dielectric grease to protect connections from moisture and corrosion.

9. Will OBDII code B1B79 RAM for the Passenger Seat Weight Sensor 3 Left Front Input Circuit Low affect the vehicle's overall performance?

This particular code is related to the passenger airbag system and may not directly impact the vehicle's performance. However, it is crucial to address the issue promptly to ensure the proper functioning of the safety systems.

10. How can I prevent OBDII code B1B79 RAM from recurring after repair?

To prevent the code from reoccurring, ensure that all repairs are performed correctly, use quality replacement parts, and periodically inspect the passenger seat sensor system for any signs of wear or damage. Regular maintenance can help avoid future issues with the airbag system.