almost all cars with computers have what called adaptive stratagy. the PCM (powertrain control module) learns what the engine is doing and make little compensations over time. example: it the engine runs lean, the 02 sensors will let the pcm know and it will richen the mixture until its normal again. your code means that something is affecting the idle quality and the pcm is adjusting the idle and now there is no more adjustment left. possibilies are, running lean due to injectors clogged or vacuum leak, unmetered air leak around MAF sensor ( reads the air coming in) fouled plugs, timing, plugged fuel filter... could also be rich due to plugged air filter, leaky injectors, bad fuel pressure regulator.... you'll need someone with a some knowlegde and tools to help you with this one if your a novice. This type of code is almost impossibe to guess due to the amount of possibilities. "Throwing darts "as we call it in the industry gets expensive!
its not cubic inches, its cubic dollars
I have seen several posts on this subject (P1582), but no one ever replies to ever fixing their cars. Some of these posts are quite old. I am sure some of the cars must have been repaired by now!I also have the code P1582 in my 97 Jetta and was hoping some one could steer me in the right direction.....thanx
cleaning it out wont do a thing on this problem
the throtle body needs to be recalibrated (remaped)with a vw scan tool not your cheap $50 code readers
i do this all the time and have many posts on it
you see it mostly on battery installs or un hooks