What Does B003B Mean?
This code indicates a malfunction in the deployment control circuit for the third stage of the second row right frontal airbag system. The airbag control module has detected a subfault condition in the wiring, connector, or airbag inflator circuitry that prevents proper deployment command capability. This compromises the supplemental restraint system's ability to protect the second row right passenger in a collision requiring multi-stage airbag deployment.
Safety Warning
Vehicle should not be driven until repaired as the second row right frontal airbag will not deploy properly in a collision, placing occupants at severe risk of injury. This is a critical safety system fault requiring immediate professional attention before carrying passengers in that seating position.
Common Causes
35%
Damaged or corroded wiring harness or connector at the second row right seat airbag inflator
30%
Faulty second row right frontal airbag inflator module with internal stage 3 circuit failure
20%
Airbag control module internal fault in stage 3 deployment driver circuit
10%
Damaged seat wiring due to seat track movement, previous repairs, or aftermarket seat covers
5%
Poor ground connection at airbag system ground point for second row circuits
Diagnostic Steps
1
Step 1: Perform visual inspection of second row right seat area, checking for damaged seat covers, aftermarket modifications, or visible wiring damage beneath the seat. Look for evidence of water intrusion or previous collision repair work.
2
Step 2: Using a multimeter, measure resistance across the second row right frontal airbag inflator connector (disconnected from vehicle harness) per manufacturer specifications, typically 2-3 ohms for stage 3 circuit. Compare readings to specifications for open or short circuit conditions.
3
Step 3: Inspect airbag connector terminals for corrosion, bent pins, or moisture using a flashlight and magnifier. Check for proper terminal lock and retention, and verify connector is fully seated with no signs of partial disconnect.
4
Step 4: With battery disconnected and appropriate waiting period observed, measure resistance and continuity of wiring harness from airbag control module connector to second row right seat airbag connector, checking for opens, shorts to ground, or shorts to voltage.
5
Step 5: If all wiring and inflator resistance tests pass, suspect airbag control module internal fault. Verify no other airbag codes present, check module for water damage or impact damage, and consider module replacement if all other components test good.
6
Step 6: After repairs, clear codes, perform airbag system self-test, and road test with multiple ignition cycles to verify fault does not return. Confirm airbag warning light operates normally and system ready indicator shows all circuits functional.
Estimated Repair Cost
$150 - $2,500
Parts + labor, varies by vehicle and location
This code indicates a malfunction in the deployment control circuit for the third stage of the second row right frontal airbag system. The airbag control module has detected a subfault condition in the wiring, connector, or airbag inflator circuitry that prevents proper deployment command capability...
The most common cause of B003B (Second Row Right Frontal Stage 3 Deployment Control (Subfault)) is: Damaged or corroded wiring harness or connector at the second row right seat airbag inflator
Typical repair costs for B003B range from $150 to $2,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle should not be driven until repaired as the second row right frontal airbag will not deploy properly in a collision, placing occupants at severe risk of injury. This is a critical safety system fault requiring immediate professional attention before carrying passengers in that seating position.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B003B to identify the root cause.
OBDHut Mobile App
Scan codes directly from your car with the OBDHut app.
Coming Soon
Quick Info
Category
Body
System
Supplemental Restraint System (SRS/Airbag)
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
