Just had Autozone computer check my 2001 X5 and came out with these 2 codes. They had to cross-reference, because the OEM brand spit out Volkswagen. The explanation was damaged air system components. Probable cause was a faulty air solenoid valve or faulty air system relay. Another cause could be a vacuum hose off or leaking, or damaged. How reliable is this check, and what should be my next move? Thanks