What Does B0038 Mean?
This code indicates the airbag control module (ACM) has detected a fault in the deployment circuit for the second row right side airbag. The subfault designation suggests an internal circuit issue, wiring problem, or component resistance outside acceptable parameters. This prevents the airbag system from functioning properly and typically illuminates the airbag warning light on the dashboard.
Safety Warning
The vehicle should not be driven as the second row right side airbag is disabled and will not deploy in a collision, significantly increasing injury risk to passengers in that seating position. Repair should be completed immediately by a qualified technician due to safety-critical nature and risk of accidental deployment during improper service.
Common Causes
35%
Faulty second row right side airbag module or internal squib resistance out of specification
30%
Damaged or corroded wiring harness or connector between airbag control module and second row right side airbag
20%
Failed airbag control module (ACM) unable to properly monitor or control deployment circuit
10%
Open or short circuit in airbag deployment loop caused by seat movement, damaged wiring under seat rails
5%
Low vehicle battery voltage causing airbag system monitoring faults
Diagnostic Steps
1
Step 1: Perform visual inspection of second row right side seat area, checking for physical damage, water intrusion, or seat modifications. Inspect airbag connector under seat for corrosion, bent pins, or loose connection.
2
Step 2: Using a digital multimeter, measure squib resistance at the second row right side airbag connector (disconnected, ACM side). Verify resistance is within manufacturer specification, typically 2-3 ohms. Check for short to ground or open circuit conditions.
3
Step 3: Inspect wiring harness from ACM to second row right side airbag for chafing, pinching under seat rails, or damage from seat movement. Pay special attention to flex points and routing through seat tracks.
4
Step 4: Check vehicle battery voltage with multimeter (should be 12.4-12.8V key off, 13.8-14.5V running). Low voltage can trigger false airbag faults. Clear codes and retest if voltage was low after charging/replacing battery.
5
Step 5: If all wiring and connections test good, perform ACM self-test function using advanced diagnostic software to isolate whether fault is in airbag module itself or control module circuitry.
6
Step 6: After repair, clear codes, cycle ignition, and verify airbag warning light extinguishes. Perform final system test to confirm all airbag circuits are functioning properly before returning vehicle to service.
Estimated Repair Cost
$200 - $1,500
Parts + labor, varies by vehicle and location
This code indicates the airbag control module (ACM) has detected a fault in the deployment circuit for the second row right side airbag. The subfault designation suggests an internal circuit issue, wiring problem, or component resistance outside acceptable parameters. This prevents the airbag system...
The most common cause of B0038 (Second Row Right Side Airbag Deployment Control (Subfault)) is: Faulty second row right side airbag module or internal squib resistance out of specification
Typical repair costs for B0038 range from $200 to $1,500, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle should not be driven as the second row right side airbag is disabled and will not deploy in a collision, significantly increasing injury risk to passengers in that seating position. Repair should be completed immediately by a qualified technician due to safety-critical nature and risk of accidental deployment during improper service.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B0038 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.
