For Mika, the red "Check Engine" light blinking on her 2010 Mitsubishi Galant was more than just a diagnostic blip—it was a lifeline to her past. The car had been her late father’s project, a rustbucket he’d resurrected with his calloused hands and her laughter as a toddler bouncing in the backseat. Now, it wheezed under her care, and the B1766 code that glared at her from the OBD2 scanner was the first real challenge since inheriting it. She didn’t know what the code meant, but she knew one thing: if her father could fix it, so could she.