Cadillac Repair: 90 Cad Deville, code sequence, diagnostic check

Question
Recently had an oil change and had the pcv valve changed. Now the check engine light is on.  When we did the diagnostic check we got E49, .7.0, F.8.5. and 888.
Look forward to hearing back on what these codes mean.
Thank you....


Answer
E49 = You have a fault in the AIR MANAGEMENT system.

.7.0 is just telling you that you are at the end of the code sequence.

F85 = No such code.

888 means the beginning of the code sequence.

Try CLEARING the codes from the computer via the climate control panel and see if any codes come back..70 and 888 are NOT codes.