My car has 89k miles on it and I had the plugs replaced, all fluids, filters, and valve cover gaskets done 15k miles ago.

Please let me know what you think is causing these codes

Code #11 After cat 02 sensor aging Cyl#1-4
Code #3E Misfire multiple/random Cylinders
Code #1A Mixture control off idle Cyl #1-4
Codes #32-39 Misfire Cyl 1-8

Thanks in advance!

O2 sensor, CPS

CPS causes cylinder misfire?

if CPS is messed up it can cause a misfire. the cps does go out on these cars a lot. since all your cylinders are misifring, i would ohm out the CPS. and various cam and crank sensors as well.

can you explain how to ohm out the various listed sensors. I have a meter I can use for this....

get a manual, i dont know the exact specs.