Codes P0015 and P0017, RPMs Fluctuate at Idle, 1,000 - 3,500?

I bought this car about two years ago. The first issue that I had with it was a blown coolant hose (quick replacement fixed the issue). The second time coolant leaked into my engine which caused my engine to overheat and instead of purchasing a new engine I had the heads fixed. This took a long time but eventually the car got back to me but with new problems. I now have two permanent codes which are p0015 and p0017. I also have the engine light on but not flashing. The issue of fluctuating RPMs during idle is the third issue which I've tried to solve. MAF sensor works. The new throttle body did not solve the problem and I've tried the relearn procedure, but it doesn't seem to work. I've also done a vacuum leak check with a smoke machine, but I couldn't find any leaks. New spark plugs and Ignition coils. I've also sprayed throttle body cleaner around the engine but no results. The car drives but when taking off from a stop it hesitates for a second before accelerating. There is a significant loss of acceleration power. I hope you guys can help me with this issue. I would appreciate any kind of help or tips. Thank you