AutoCodes – Chrysler – B1B78 Chrysler

B1B78 Chrysler Code - Passenger Seat Weight Sensor 3 Left Front Performance

Quick Answer

During the Occupant Classification Module (OCM) system verification test if the module detects that the sensor input is less than 1.4 volts or greater than 3.6 volts. 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: B1B78 Chrysler indicates Passenger Seat Weight Sensor 3 Left Front Performance.
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 610

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 B1B78 Chrysler Description

During the Occupant Classification Module (OCM) system verification test if the module detects that the sensor input is less than 1.4 volts or greater than 3.6 volts. During auto zero: if the module detects that the sensor input is less than 1 volt or greater than 4 volts.

OBDII Code B1B78 Chrysler - Passenger Seat Weight Sensor 3 Left Front Performance - AutoCodes.com — B1B78 Chrysler Code - Passenger Seat Weight Sensor 3 Left Front Performance

What does this mean?

What are the Possible Causes of the DTC B1B78 Chrysler?

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 B1B78 Chrysler?

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 B1B78 Chrysler 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 B1B78 Chrysler code?

Need more information on how to fix the B1B78 Chrysler code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B78 Chrysler 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 B1B78 Chrysler Code

1. What are the common symptoms of OBDII code B1B78 for the Passenger Seat Weight Sensor 3 Left Front Performance in a Chrysler?

- Common symptoms include the airbag warning light staying illuminated on the dashboard, as well as potential issues with the passenger airbag system.

2. What can cause the OBDII code B1B78 to trigger in a Chrysler related to the Passenger Seat Weight Sensor 3 Left Front Performance?

- The code B1B78 can be triggered by issues with the passenger seat weight sensor itself, such as a faulty sensor, wiring problems, or sensor calibration issues.

3. How can I diagnose the OBDII code B1B78 for the Passenger Seat Weight Sensor 3 Left Front Performance in my Chrysler?

- Diagnosis typically involves using a diagnostic scanner to read the fault codes, checking the wiring and connections related to the passenger seat weight sensor, and testing the sensor itself for proper functionality.

4. Can I still drive my Chrysler if the OBDII code B1B78 is present for the Passenger Seat Weight Sensor 3 Left Front Performance?

- It is generally not recommended to drive the vehicle with an active airbag-related fault code, as it may affect the proper functioning of the passenger airbag in the event of a collision.

5. What are some repair tips for addressing the OBDII code B1B78 in a Chrysler related to the Passenger Seat Weight Sensor 3 Left Front Performance?

- Repair tips may include checking and cleaning the sensor connections, ensuring the sensor is properly calibrated, replacing the sensor if necessary, and clearing the fault code to see if it returns.

6. Is it safe to attempt to repair the OBDII code B1B78 for the Passenger Seat Weight Sensor 3 Left Front Performance in a Chrysler on my own?

- While some basic troubleshooting steps can be taken, it is recommended to have airbag-related issues inspected and repaired by a qualified technician to ensure proper functioning and safety.

7. How much does it typically cost to repair the OBDII code B1B78 for the Passenger Seat Weight Sensor 3 Left Front Performance in a Chrysler?

- The cost of repairs can vary depending on the specific issue causing the fault code, but it may involve sensor replacement, wiring repairs, or calibration adjustments, which could range from a few hundred to over a thousand dollars.

8. Can resetting the fault code associated with the Passenger Seat Weight Sensor 3 Left Front Performance in a Chrysler resolve the issue?

- Resetting the fault code may temporarily turn off the warning light, but if the underlying issue causing the code is not addressed, the light is likely to come back on after some time.

9. Are there any recalls or technical service bulletins related to the OBDII code B1B78 for the Passenger Seat Weight Sensor 3 Left Front Performance in Chrysler vehicles?

- It's advisable to check with a Chrysler dealership or visit the NHTSA website to see if there are any recalls or bulletins related to this specific fault code to determine if there are any known issues or solutions provided by the manufacturer.

10. How important is it to address the OBDII code B1B78 for the Passenger Seat Weight Sensor 3 Left Front Performance in a Chrysler promptly?

- It is crucial to address airbag-related fault codes promptly to ensure the proper functioning of the passenger airbag system in the event of a collision, as the safety of occupants can be compromised if the system is not working correctly.