well, by clearing the codes, you erased the memory settings . the motor has to do a re learn for the idle.
also, when you cleared the codes you erased needed freeze frame data for a tech to see which could lead him in the right direction for the repair.
your 420 code is most likely a failed cat converter. the others are related to the cam sensor but a code never identifies a bad part just a failed system.
drive the car steady at 45-55 for 5 minutes to help the idle re learn. beyond that, how did it run??

Roy

Answered by ASEMaster6371 (expert)
24,854 answers provided

hi, thanks for the answer. The codes were printed for me, so I have them. I will try and run the car as you suggested. Other than that, the car seems to run fine. Other than the Cat code, what is it I am looking for that would indicate the cat converter is actually failing? Is there a possibility of some fuel sensor or fuel pump problem or is it really as simple as it needing to re-learn the idle?

Response from desertanchor
1 question asked

it may just neeed a re learn. you will see. the cat code may not come back for a couple of days as it has to fail the monitor test 3 times for the code to set.

Roy

Answered by ASEMaster6371 (expert)
24,854 answers provided