Did you know that your car has several computers running its major systems? It's true. These advanced computer systems alert you of potential problems by posting warning messages on your dash. Once you receive such a warning on your dash, it's important to take your car to a trained computer diagnostics technician for analysis. Guaranteed Auto Air & Repair's ASE certified Master Technicians use state-of-the-art equipment to quickly and properly diagnose problems with any major systems.