What Does B0002 Mean?
This code indicates a malfunction in the driver-side frontal airbag second-stage deployment circuit. The airbag control module (ACM) has detected an abnormal condition such as high or low resistance, short circuit, or open circuit in the wiring, connectors, or the airbag inflator itself that would prevent proper deployment of the second stage during a qualifying crash event. This is a critical safety system fault that requires immediate attention.
Safety Warning
This vehicle is NOT safe to drive as the driver airbag may not deploy properly in a crash, significantly increasing risk of serious injury or death. The airbag system requires immediate professional diagnosis and repair before operating the vehicle.
Common Causes
35%
Faulty driver-side frontal airbag inflator or internal stage 2 squib resistance out of specification
30%
Damaged or corroded wiring harness or connectors in the airbag deployment circuit between ACM and driver airbag
25%
Defective or damaged clock spring assembly in steering column preventing proper electrical continuity
10%
Faulty airbag control module (ACM) with internal driver circuit failure
Diagnostic Steps
1
Step 1: Perform visual inspection of driver airbag module for physical damage, water intrusion, or previous deployment. Check for proper seating and security of airbag module in steering wheel
2
Step 2: Disconnect battery and wait 10+ minutes for capacitor discharge. Using a digital multimeter, measure resistance across the driver airbag stage 2 squib terminals (typically 2-4 ohms). Compare to manufacturer specifications
3
Step 3: Inspect clock spring connector behind steering wheel for corrosion, bent pins, or damage. Check continuity through clock spring assembly from ACM harness side to airbag module side while rotating steering wheel lock-to-lock
4
Step 4: Trace and inspect all wiring from ACM to clock spring for chafing, cuts, pinched wires, or signs of previous repairs. Pay special attention to areas where harness passes through firewall and under carpet
5
Step 5: If all wiring and resistance checks are within specification, perform ACM self-test function using advanced diagnostic scanner to verify internal driver circuit integrity
6
Step 6: Clear codes, reconnect all components, and verify repair by performing system self-test. Ensure airbag warning light operates normally (illuminates at key-on, then extinguishes after 6-8 seconds)
Estimated Repair Cost
$400 - $1,800
Parts + labor, varies by vehicle and location
This code indicates a malfunction in the driver-side frontal airbag second-stage deployment circuit. The airbag control module (ACM) has detected an abnormal condition such as high or low resistance, short circuit, or open circuit in the wiring, connectors, or the airbag inflator itself that would p...
The most common cause of B0002 (Driver Frontal Stage 2 Deployment Control (Subfault)) is: Faulty driver-side frontal airbag inflator or internal stage 2 squib resistance out of specification
Typical repair costs for B0002 range from $400 to $1,800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This vehicle is NOT safe to drive as the driver airbag may not deploy properly in a crash, significantly increasing risk of serious injury or death. The airbag system requires immediate professional diagnosis and repair before operating the vehicle.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B0002 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.
