What Does B00D3 Mean?
This code indicates a malfunction in the secondary restraint system monitoring circuit, specifically related to a subfault in the airbag or supplemental restraint system (SRS) warning indicator circuit. The restraints control module has detected an abnormal condition in the secondary malfunction indicator lamp circuit or its driver circuit. This typically means the warning light itself, its wiring, or the control module's output driver has failed or is experiencing an intermittent fault.
Common Causes
35%
Faulty airbag warning lamp bulb or LED cluster in instrument panel
30%
Open or short circuit in airbag indicator lamp wiring harness between restraints module and instrument cluster
20%
Failed restraints control module internal driver circuit for malfunction indicator lamp
10%
Poor ground connection at instrument cluster or restraints control module
5%
Corrupted restraints control module software or memory fault
Diagnostic Steps
1
Step 1: Perform visual inspection of the airbag warning lamp in the instrument cluster during key-on engine-off bulb test - verify the secondary SRS indicator illuminates during self-test and observe for flickering or complete failure to light
2
Step 2: Using a multimeter, backprobe the indicator lamp circuit at the instrument cluster connector with ignition on - verify presence of voltage signal (typically 12V) from the restraints control module when commanded to illuminate
3
Step 3: Check continuity of the indicator lamp circuit wiring from restraints control module to instrument cluster with ignition off - measure resistance (should be less than 5 ohms) and check for shorts to ground or power
4
Step 4: Verify ground circuits at both instrument cluster and restraints control module using multimeter - measure resistance to battery negative (should be less than 1 ohm) and inspect physical ground connections for corrosion
5
Step 5: If all wiring and grounds test normal, perform restraints control module output driver test using bidirectional controls in scan tool to manually command indicator lamp on/off - verify module can properly control the circuit
6
Step 6: Clear codes and perform system retest with all components reconnected - monitor live data for indicator lamp status and verify proper operation through multiple key cycles to confirm repair
Estimated Repair Cost
$100 - $800
Parts + labor, varies by vehicle and location
This code indicates a malfunction in the secondary restraint system monitoring circuit, specifically related to a subfault in the airbag or supplemental restraint system (SRS) warning indicator circuit. The restraints control module has detected an abnormal condition in the secondary malfunction ind...
The most common cause of B00D3 (Restraint System Malfunction Indicator 2 (Subfault)) is: Faulty airbag warning lamp bulb or LED cluster in instrument panel
Typical repair costs for B00D3 range from $100 to $800, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle is generally safe to drive as this code relates to the warning indicator circuit rather than the actual airbag deployment system, however the inability to monitor SRS status through the warning lamp means you will not be alerted to potential airbag system faults. Repair should be completed promptly to restore proper safety system monitoring capability.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B00D3 to identify the root cause.
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Quick Info
Category
Body
System
Supplemental Restraint System (SRS) / Airbag System
Difficulty
Type
Generic (SAE)
Recommended Tools
OBD2 Scanner
A quality scan tool helps you read codes, view live data, and clear faults.
