What Does B003A Mean?
This code indicates a fault in the second-row right frontal airbag's stage 2 deployment circuit. The airbag control module has detected an electrical or mechanical subfault in the deployment control system for the dual-stage airbag inflator on the passenger side of the second row. This prevents proper communication or control of the second inflation stage, which could compromise occupant protection in a crash.
Safety Warning
This is a critical safety system fault that compromises occupant protection in the second row during a collision. The vehicle should not be driven with passengers in the second row right seat until repaired, as the airbag may not deploy properly or at all in a crash.
Common Causes
35%
Faulty or corroded wiring harness connection to the second row right frontal airbag inflator, including damaged pins or loose connectors
30%
Defective second row right frontal airbag inflator module with internal stage 2 deployment circuit failure
20%
Airbag control module internal fault affecting stage 2 deployment circuit monitoring or control
15%
Damaged or compromised wiring between airbag control module and second row right airbag due to previous seat removal or collision repair
Diagnostic Steps
1
Step 1: Perform visual inspection of second row right seat area, checking for any prior collision damage, seat modifications, or obvious wiring damage. Remove seat cushion if necessary to access airbag module and connectors.
2
Step 2: Inspect the airbag inflator connector at the second row right frontal airbag for corrosion, bent pins, moisture intrusion, or loose connection. Check connector lock mechanism is fully engaged and terminals show no signs of overheating.
3
Step 3: Using a digital multimeter, measure resistance across the stage 2 deployment circuit at the airbag inflator connector (disconnected) per manufacturer specifications, typically 2-3 ohms. Compare to stage 1 circuit resistance to identify circuit-specific faults.
4
Step 4: Check continuity and resistance of wiring harness from airbag control module to second row right airbag connector, looking for opens, shorts to ground, or shorts to power. Pay special attention to wiring routing under seat tracks where chafing commonly occurs.
5
Step 5: If all wiring and connections test normal, substitute a known-good second row right frontal airbag assembly to verify inflator failure, or test airbag control module output signals with an oscilloscope if available.
6
Step 6: After repair, clear codes and perform airbag system self-test using scan tool. Verify airbag warning light extinguishes and no codes return. Document all resistance values and repair actions for warranty purposes.
Estimated Repair Cost
$400 - $1,800
Parts + labor, varies by vehicle and location
This code indicates a fault in the second-row right frontal airbag's stage 2 deployment circuit. The airbag control module has detected an electrical or mechanical subfault in the deployment control system for the dual-stage airbag inflator on the passenger side of the second row. This prevents prop...
The most common cause of B003A (Second Row Right Frontal Stage 2 Deployment Control (Subfault)) is: Faulty or corroded wiring harness connection to the second row right frontal airbag inflator, including damaged pins or loose connectors
Typical repair costs for B003A range from $400 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is a critical safety system fault that compromises occupant protection in the second row during a collision. The vehicle should not be driven with passengers in the second row right seat until repaired, as the airbag may not deploy properly or at all in a crash.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B003A to identify the root cause.
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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.
