AutoCodes – Generic – B0081

B0081 Code - Passenger Presence Module Malfunction

Quick Answer

When the ignition is turned ON, the Passenger Presence Module and the Inflatable Restraint Sensing and Diagnostic Module perform tests to diagnose critical malfunctions within itself. Common causes include Faulty Passenger Presence Module, Passenger Presence Module harness is open or shorted, Passenger Presence Module 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: B0081 indicates Passenger Presence Module Malfunction.
Common causes: Common causes include Faulty Passenger Presence Module, Passenger Presence Module harness is open or shorted, Passenger Presence Module 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 3,238

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 Oct 18, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0081 Description

When the ignition is turned ON, the Passenger Presence Module and the Inflatable Restraint Sensing and Diagnostic Module perform tests to diagnose critical malfunctions within itself. When the Inflatable Restraint Sensing and Diagnostic Module has completed the power-up mode, the Inflatable Restraint Sensing and Diagnostic Module will establish communication with the Passenger Presence Module. The Inflatable Restraint Sensing and Diagnostic Module will also request the instrument panel cluster to illuminate both of the PASSENGER AIR BAG ON/OFF indicators for 5 seconds. If the Inflatable Restraint Sensing and Diagnostic Module detect that the Passenger Presence Module has set a current Diagnostic Trouble Code (DTC), the Inflatable Restraint Sensing and Diagnostic Module will then disable the passenger instrument panel air bag deployment loop, set DTC B0081, and illuminate the AIR BAG indicator. The DTC will be set when the Inflatable Restraint Sensing and Diagnostic Module has a general fault present.

OBDII Code B0081 - Passenger Presence Module Malfunction - AutoCodes.com — B0081 Code - Passenger Presence Module Malfunction

What does this mean?

What are the Possible Causes of the DTC B0081?

Faulty Passenger Presence Module
Passenger Presence Module harness is open or shorted
Passenger Presence Module circuit poor electrical connection
Faulty Inflatable Restraint Sensing and Diagnostic Module (SDM)

How to Fix the DTC B0081?

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 does this mean?

Code Tech Notes

B0081:00 Passenger Presence Module Malfunction (sets in the Inflatable Restraint Sensing and Diagnostic Module)
B0081:11 Passenger Presence Module Above Threshold (Build Check Failure) (sets in the Passenger Presence Module)
B0081:3A Passenger Presence Module Incorrect Component Installed (sets in the Inflatable Restraint Sensing and Diagnostic Module)
B0081:4B Passenger Presence Module Calibration Not Learned (sets in the Passenger Presence Module)
B0081:5A Passenger Presence Module Plausibility Failure (sets in the Passenger Presence Module)
B0081:71 Passenger Presence Module Invalid Serial Data Received (sets in Inflatable Restraint Sensing and Diagnostic Module)

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B0081 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 B0081 code?

Need more information on how to fix the B0081 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B0081 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B0081 Buick — Passenger Presence Module Malfunction
B0081 Cadillac — Passenger Presence Module Malfunction
B0081 Chevrolet — Passenger Presence Module Malfunction
B0081 GMC — Passenger Presence Module Malfunction
B0081 Hummer — Passenger Presence Module Malfunction
B0081 Pontiac — Passenger Presence Module Malfunction
B0081 Saturn — Passenger Presence Module Malfunction

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 B0081 Code

1. What are common symptoms of OBDII code B0081 (Passenger Presence Module Malfunction)?

- Common symptoms include the airbag warning light staying on, the passenger airbag being disabled, and potential issues with the seatbelt warning system.

2. What can cause the OBDII code B0081 to trigger?

- The code can be triggered by a malfunction in the passenger presence module, damaged wiring, a faulty sensor, or a problem with the airbag control module.

3. How serious is the OBDII code B0081 (Passenger Presence Module Malfunction)?

- This code indicates a potential issue with the passenger airbag system, so it should be addressed promptly to ensure the proper functioning of the airbag in case of an accident.

4. Can I drive my vehicle with the OBDII code B0081 active?

- It is generally not recommended to drive with this code active, as it may indicate that the passenger airbag is not functioning correctly, which could compromise safety in the event of a collision.

5. How can I diagnose the cause of OBDII code B0081?

- Diagnosis typically involves using a scan tool to retrieve the specific error codes, checking the passenger presence module, inspecting wiring for damage, and testing sensors for proper operation.

6. Is it possible to reset OBDII code B0081 without fixing the underlying issue?

- Resetting the code without fixing the underlying problem will likely result in the code reappearing once the system detects the ongoing issue during a self-check.

7. What are some repair tips for addressing OBDII code B0081?

- Repair tips may include checking and repairing damaged wiring, replacing a faulty sensor or passenger presence module, and ensuring proper connections within the airbag system.

8. Can a DIY enthusiast fix OBDII code B0081 at home?

- Depending on the specific cause of the malfunction, some DIY enthusiasts with experience in automotive repair may be able to address the issue at home. However, working on airbag systems requires caution and expertise.

9. How much does it typically cost to repair OBDII code B0081?

- The cost of repairs for this code can vary depending on the root cause of the issue, the parts needed for replacement, and whether the repair is done at a dealership or an independent repair shop.

10. What should I do if I continue to experience issues with OBDII code B0081 after attempting repairs?

- If the code persists after attempting repairs, it is recommended to seek professional assistance from a certified mechanic or dealership to further diagnose and address the problem.