my car just out of the blue today started to idol really high like 2k. It had been idling fine ever sense i replace the throttle cable (900rpm) and just started doing it. I can not figure it out i have tried everything i can think of. I looked for any loose connections, throttle, re adjusted the throttle cable few different times. IT just will not drop down. Its throwing code 42, 51, and 52 (i think those were the other ones) What can i look for on code 42?? Need help..