AutoCodes – Generic – B1B88

B1B88 Code - Passenger Seat Weight Sensor 1 Right Rear 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 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: B1B88 indicates Passenger Seat Weight Sensor 1 Right Rear Input Circuit Low.
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 2,193

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
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Code B1B88 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 B1B88 - Passenger Seat Weight Sensor 1 Right Rear Input Circuit Low - AutoCodes.com — B1B88 Code - Passenger Seat Weight Sensor 1 Right Rear Input Circuit Low

What does this mean?

What are the Possible Causes of the DTC B1B88?

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 B1B88?

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 B1B88 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 B1B88 code?

Need more information on how to fix the B1B88 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1B88 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1B88 Chrysler — Passenger Seat Weight Sensor 1 Right Rear Input Circuit Low
B1B88 Dodge — Passenger Seat Weight Sensor 1 Right Rear Input Circuit Low
B1B88 Jeep — Passenger Seat Weight Sensor 1 Right Rear Input Circuit Low
B1B88 Mitsubishi — Passenger Seat Weight Sensor 1 Right Rear Input Circuit Low
B1B88 RAM — Passenger Seat Weight Sensor 1 Right Rear 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 B1B88 Code

1. What are the common symptoms of OBDII code B1B88?

The common symptoms of code B1B88 include the airbag warning light illuminated on the dashboard and potential issues with the passenger seat weight sensor.

2. What causes the OBDII code B1B88 to trigger?

The B1B88 code is typically triggered by a malfunction in the passenger seat weight sensor 1 right rear input circuit, indicating a low input signal.

3. Can a DIYer repair OBDII code B1B88?

Repairing OBDII code B1B88 often requires advanced diagnostic tools and knowledge about airbag systems. It is recommended to seek professional help to diagnose and fix this issue.

4. Is it safe to drive with OBDII code B1B88?

It is not recommended to drive with the B1B88 code active, as it indicates a potential problem with the passenger seat weight sensor, which could affect the proper functioning of the airbag system.

5. How can I troubleshoot OBDII code B1B88?

Troubleshooting B1B88 involves checking the wiring and connections related to the passenger seat weight sensor, as well as testing the sensor itself for proper functionality.

6. What is the passenger seat weight sensor responsible for?

The passenger seat weight sensor is responsible for detecting the presence and weight of a passenger in the seat to determine whether to activate or deactivate the airbag system.

7. Can resetting the OBDII code B1B88 make it go away permanently?

Resetting the B1B88 code may temporarily turn off the warning light, but if the underlying issue with the passenger seat weight sensor is not addressed, the code is likely to reappear.

8. How much does it cost to repair OBDII code B1B88?

The cost of repairing B1B88 can vary depending on the exact cause of the issue. It is advisable to consult a mechanic for a proper diagnosis and cost estimate.

9. Are there any safety concerns associated with OBDII code B1B88?

Yes, there are safety concerns associated with B1B88, as it indicates a potential problem with the airbag system, which is a critical safety feature in the event of a collision.

10. Can OBDII code B1B88 affect vehicle performance?

While B1B88 is related to the airbag system and not directly linked to vehicle performance, ignoring this code could impact overall safety and the proper functioning of the airbag system.