What Does B0076 Mean?
This code indicates a malfunction in the deployment control circuit for the third row left seatbelt pretensioner system. The Body Control Module (BCM) or Airbag Control Module has detected an electrical fault or subfault condition in the firing circuit that would deploy the pretensioner during a collision. This is a safety-critical system component that tensions the seatbelt before impact to properly restrain occupants.
Safety Warning
This is a critical safety system fault that compromises occupant protection in the third row left seating position during a collision. The vehicle should not be driven with passengers in the affected seat until repaired, as the pretensioner may not deploy properly in a crash. The airbag warning light will remain illuminated.
Common Causes
35%
Faulty seatbelt pretensioner unit with internal circuit failure or damaged squib
30%
Damaged or corroded wiring harness or connector at the pretensioner
20%
Faulty Airbag Control Module or Body Control Module
10%
High resistance in pretensioner circuit due to damaged wiring or poor ground connection
5%
Previous deployment not properly reset or inadvertent deployment event
Diagnostic Steps
1
Step 1: Perform visual inspection of the third row left seatbelt pretensioner assembly for signs of previous deployment, physical damage, water intrusion, or corrosion at the connector. Check for visible wiring damage along the harness route.
2
Step 2: Disconnect the pretensioner connector and measure resistance across the pretensioner squib terminals using a high-impedance digital multimeter (never use a test light on airbag circuits). Expected reading should typically be 2-5 ohms; consult manufacturer specifications for exact values.
3
Step 3: Measure continuity and resistance from the pretensioner connector back to the Airbag Control Module connector on both circuit wires. Readings should show less than 5 ohms total circuit resistance and no short to ground or power.
4
Step 4: If wiring and pretensioner resistance are within specifications, perform a voltage test at the module side with pretensioner disconnected to verify the control module is providing proper standby voltage (typically 1-3 volts). Inspect module connectors for corrosion or damage.
5
Step 5: Clear codes and attempt to reset the system. If code returns immediately without key cycling, suspect module failure. If code only returns after vehicle movement or conditions change, suspect intermittent connection issue.
6
Step 6: After repairs, clear all codes, perform a system initialization/calibration procedure if required by manufacturer, and verify proper system operation with no codes returning. Test with multiple key cycles and vehicle movement.
Estimated Repair Cost
$300 - $1,200
Parts + labor, varies by vehicle and location
This code indicates a malfunction in the deployment control circuit for the third row left seatbelt pretensioner system. The Body Control Module (BCM) or Airbag Control Module has detected an electrical fault or subfault condition in the firing circuit that would deploy the pretensioner during a col...
The most common cause of B0076 (Third Row Left Seatbelt Pretensioner Deployment Control (Subfault)) is: Faulty seatbelt pretensioner unit with internal circuit failure or damaged squib
Typical repair costs for B0076 range from $300 to $1,200, 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 third row left seating position during a collision. The vehicle should not be driven with passengers in the affected seat until repaired, as the pretensioner may not deploy properly in a crash. The airbag warning light will remain illuminated.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B0076 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
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