B0081 Hummer: Code Meaning, Causes, Symptoms, & Tech Notes

|What are the Possible Causes of the Code 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 B0081 Hummer Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

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|Code B0081 Hummer 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 B0081 Hummer?

Labor: 1.0

The cost to diagnose the B0081 Hummer code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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|What are Code B0081 Hummer Possible Symptoms?

Air Bag Warning Light ON

|What Does the B0081 Hummer Code Mean?

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.

B0081 Hummer Code - Passenger Presence Module Malfunction

|Need more Information on the B0081 Hummer Code?

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|Need Help with the B0081 Hummer Code?

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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.