What Does B0041 Mean?
This code indicates a malfunction in the third row left frontal airbag deployment circuit, specifically the Stage 1 deployment control with a subfault condition. The Restraint Control Module (RCM) or Airbag Control Module (ACM) has detected an electrical abnormality in the wiring, connector, or airbag module itself that prevents proper stage 1 deployment functionality. This compromises the supplemental restraint system's ability to protect third row occupants in a frontal collision.
Safety Warning
The vehicle is NOT safe to drive with this fault as the third row left frontal airbag will not deploy properly in a collision, significantly increasing injury risk to occupants in that seating position. This is a critical safety system failure requiring immediate professional diagnosis and repair before transporting passengers in the third row.
Common Causes
35%
Damaged or corroded wiring harness/connectors in third row airbag circuit
30%
Faulty third row left frontal airbag module or inflator
20%
Open or short circuit in airbag deployment loop
15%
Faulty Restraint Control Module (RCM) or internal circuit failure
Diagnostic Steps
1
Step 1: Perform visual inspection of third row left seat area for airbag module damage, water intrusion, or deployed condition. Check for recent collision history or seat removal/replacement.
2
Step 2: Using a digital multimeter, measure resistance across the airbag squib terminals at the module connector (disconnected). Expected reading is typically 2-3 ohms; consult manufacturer specifications for exact values.
3
Step 3: Inspect all connectors in the third row airbag circuit for corrosion, bent pins, or moisture. Pay special attention to underside of seat and B-pillar harness routing points. Check for proper connector lock engagement.
4
Step 4: Measure continuity and resistance between RCM connector pins and airbag module connector through the entire harness. Check for opens, shorts to ground, or shorts to power (harness disconnected at both ends).
5
Step 5: If wiring and module resistance are within specifications, substitute a known-good RCM (if available) or monitor live data for voltage readings at the deployment circuit. Normal voltage should be between 1-3 volts in standby mode.
6
Step 6: Clear codes and perform airbag system self-test. Verify repair by monitoring freeze frame data and ensuring code does not return after multiple key cycles and test drive.
Estimated Repair Cost
$300 - $1,800
Parts + labor, varies by vehicle and location
This code indicates a malfunction in the third row left frontal airbag deployment circuit, specifically the Stage 1 deployment control with a subfault condition. The Restraint Control Module (RCM) or Airbag Control Module (ACM) has detected an electrical abnormality in the wiring, connector, or airb...
The most common cause of B0041 (Third Row Left Frontal Stage 1 Deployment Control (Subfault)) is: Damaged or corroded wiring harness/connectors in third row airbag circuit
Typical repair costs for B0041 range from $300 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle is NOT safe to drive with this fault as the third row left frontal airbag will not deploy properly in a collision, significantly increasing injury risk to occupants in that seating position. This is a critical safety system failure requiring immediate professional diagnosis and repair before transporting passengers in the third row.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B0041 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.
