Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the part of the car that tightens the seatbelt in the middle seat of the third row during a crash.
The B0077 code indicates an issue with the control circuit for the seat belt pretensioner in the third row center seat.
The B0077 code is set when the airbag control module detects a fault in the deployment control circuit for the third row center seat belt pretensioner. This pretensioner is designed to tighten the seatbelt in the event of a collision, helping to secure passengers.
• Airbag warning light is on
• Seatbelt may not function properly
• Possible error message on dashboard
• Faulty seat belt pretensioner
• Damaged wiring or connectors
• Faulty airbag control module
Pretensioner: A device that tightens the seatbelt in the event of a crash.
Airbag Control Module: A computer that manages the deployment of airbags and seatbelt pretensioners.
• Perform a visual inspection of the seat belt pretensioner and related wiring.
• Use an OBD-II scanner to check for additional codes.
• Test the continuity and resistance of the pretensioner circuit.
• Replace the faulty seat belt pretensioner.
• Repair or replace damaged wiring or connectors.
• Replace the airbag control module if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools
$150 - $500
Moderate
• Chevrolet Suburban
• GMC Yukon
• Cadillac Escalade
• Regularly inspect seat belts and pretensioners.
• Avoid spillage or moisture near seat belt components.
• Have the airbag system checked periodically.
Safety System Issue
• Do not ignore the airbag warning light.
• Have the system checked by a professional as soon as possible.
Check with the manufacturer for warranty coverage on safety components.
The B0077 code has been associated with issues in vehicles with third-row seating, particularly in SUVs and minivans.
High – This issue affects the safety system of the vehicle and should be addressed immediately.
Driving with a faulty seat belt pretensioner can compromise passenger safety and may not comply with vehicle safety regulations.
• Vehicle stationary
• Ignition on, engine off
The third row center seat belt pretensioner is located in the rear of the vehicle, typically under the seat or in the seatbelt retractor mechanism.
Q: Can I drive with the B0077 code?
A: It's not recommended to drive with this code active, as it indicates a potential safety issue with the seatbelt system.
Q: How do I reset the airbag light after fixing the issue?
A: After repairs, use an OBD-II scanner to clear the code and reset the airbag light.
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A solid entry-level multimeter for voltage, continuity, resistance, and basic electrical troubleshooting.
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