B2AAAAirbag/SRS

Occupant Classification System Fault

B2AAA indicates a fault in the occupant classification system (OCS) that weighs the passenger seat to decide whether to enable the passenger airbag. A fault can leave the airbag improperly enabled or disabled.

🚗 Yes, but passenger airbag enable/disable may be wrong, so address it promptly.

HIGH

severity

🎯 Top Causes, Ranked by Likelihood

#1Faulty seat weight sensor or mat$200-$800

40%

The pressure sensor or seat mat fails and misreads occupancy.

#2Connector or wiring fault$50-$250

30%

A loose seat connector disrupts the OCS signal.

#3OCS module needs calibration$100-$300

20%

The system requires a zero/calibration procedure.

🩺 Common Symptoms

Passenger airbag light stuck on or off
Airbag enabled/disabled incorrectly
Fault after seat work
OCS code stored

💰 Repair Cost: DIY vs Shop

DIY Cost

$0-$300

Shop Cost

$150-$800

📋 Free OBD2 Code Cheat Sheet

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🔧 How to Diagnose B2AAA

1Check the passenger airbag status indicator

2Inspect the seat sensor connector and wiring

3Perform the OCS calibration procedure

4Replace the seat sensor or mat if calibration fails

❓ Frequently Asked Questions

What does B2AAA mean?

The system that classifies the passenger by weight has a fault, so the passenger airbag may be enabled or disabled incorrectly.

Can I drive with B2AAA?

Yes, but the passenger airbag decision may be wrong, so get it checked promptly.

What causes B2AAA?

A failed seat weight sensor, wiring fault, or a system that needs calibration.

🔗 Related Codes

B0010B0058B0855U0151