The code (often paired with B0065 ) is a diagnostic trouble code related to a vehicle's Supplemental Restraint System (SRS) , commonly found in General Motors vehicles like the Chevrolet Colorado and GMC Canyon. It indicates a fault in the passenger-side seat belt pretensioner circuit, which is critical for safety during a collision.
The SRS module constantly monitors the electrical resistance and voltage of various airbag components. When it detects an anomaly, it triggers the airbag warning light and stores a code: : Left (driver side) Frontal Deployment Loop. b0066.mp4
: In trucks like the Colorado and Canyon, wires pass through a rubber boot in the door jamb. Years of opening and closing the door can cause these wires to stretch and eventually snap . The code (often paired with B0065 ) is
: Vibrations or seat adjustments can loosen the yellow connectors typically found under the seats. When it detects an anomaly, it triggers the
While it may seem like a major component failure, the root cause is often a simple electrical break: