Keller's Pro Auto & Diesel is an auto repair shop in Parker, Colorado, offering services to address check engine light issues and provide diagnostic solutions for vehicles. They advise Parker drivers on the importance of not clearing codes to turn off the check engine light, as it erases crucial diagnostic information needed for accurate problem diagnosis. Keller's Pro Auto & Diesel installs quality NAPA replacement parts and provides a 5-year/50,000-mile nationwide warranty, instilling confidence and peace of mind in their customers. Their core focus is on professional auto and diesel repair services, ensuring reliable and efficient solutions for vehicle maintenance.