AutoCodes – Hummer – B0081 Hummer

B0081 Hummer 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 Hummer 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 2,762

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 23, 2022

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code B0081 Hummer 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 Hummer - Passenger Presence Module Malfunction - AutoCodes.com — B0081 Hummer Code - Passenger Presence Module Malfunction

What does this mean?

What are the Possible Causes of the DTC B0081 Hummer?

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 Hummer?

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 Hummer 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 Hummer code?

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

Need Help with the Code?

Get the B0081 Hummer 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 B0081 Hummer Code

1. What are common symptoms of OBDII code B0081 in a Hummer?

- Common symptoms include the airbag warning light staying on, the passenger airbag not deploying in a collision, and an error message related to the Passenger Presence Module.

2. What does the OBDII code B0081 for a Hummer indicate?

- OBDII code B0081 indicates a malfunction in the Passenger Presence Module, which is responsible for detecting if a passenger is seated and enabling the airbag accordingly.

3. What are possible causes of the Passenger Presence Module malfunction in a Hummer?

- Possible causes include a faulty Passenger Presence Module, damaged wiring or connectors, software issues, or a problem with the passenger seat sensor.

4. How can I diagnose the cause of OBDII code B0081 in my Hummer?

- To diagnose the issue, it is recommended to perform a thorough inspection of the Passenger Presence Module, check the wiring and connectors for damage, and use a diagnostic scanner to retrieve specific error codes.

5. Can I still drive my Hummer with the OBDII code B0081 present?

- It is not recommended to drive the vehicle with the OBDII code B0081 present, as it indicates a potential safety issue with the passenger airbag system.

6. Is it possible to reset the OBDII code B0081 in a Hummer without repairing the issue?

- While you can clear the code temporarily with a diagnostic scanner, it will likely reappear until the underlying issue with the Passenger Presence Module is addressed.

7. How much does it typically cost to repair the Passenger Presence Module in a Hummer?

- The cost of repairing the Passenger Presence Module can vary depending on the extent of the damage and whether it needs to be replaced entirely. It is recommended to consult a professional for an accurate estimate.

8. Can I replace the Passenger Presence Module in my Hummer myself?

- Replacing the Passenger Presence Module in a Hummer can be complex and may require specialized tools and knowledge. It is recommended to have the repair done by a qualified technician.

9. Are there any recalls or technical service bulletins related to OBDII code B0081 in Hummers?

- It is advisable to check with the manufacturer or a dealership to see if there are any recalls or technical service bulletins related to the Passenger Presence Module issue in your specific Hummer model.

10. How important is it to fix OBDII code B0081 in a Hummer promptly?

- It is crucial to address OBDII code B0081 promptly, as it indicates a potential safety risk with the passenger airbag system. Ignoring the issue could compromise the effectiveness of the airbag in an accident.