SOURCE: 2002 volkswagon cabrio glx fault code p1582 idle
For the Volkswagen cars the Throttle body is actuated by a motor and sensor. The motor opens and closes the throttle at idle to allow more or less fuel in as needed. Over the miles as the car engine ages and accumulates dirt the Engine control unit has to push the motor rod out a little further to allow more air into the engine. The P1582 code is thrown when the motor of the TB is at its end of travel and cannot go any further. If you are VERY technical and DIY with cars you can possibly clean it but its a laborious task. Here are instructions for a Jetta (you have similar engine) and has its dangers for further damage. http://faculty.ccp.edu/faculty/dreed/campingart/jettatech/p1582/index.htmOtherwise it might be best to have yoru dealer or mechanic replace the Throttle body and clear the code. The repair will require VAGCOM a Volkswagen software program to recode teh ECU and set timing, mixture, etc after eitehr cleaning or replacement. The lin
the 1582 code is a flight recorder code meaning that at some point one of the following has happened: the inertia switch has been triggered,throttle body signal has triggered the limp mode,the engine starts but stumble and then shuts off,or engine fail to start,or a engine stall has occured.This is what causes this code.If the issue was resolved,clear the code becuae it can become permanent and although the car will run fine the code will be there without a mil showing.
1 Inertia switch activated
2 Throttle Limp Home mode
3 Engine starts and stumbles
4 Engine fail to start
5 Engine stall
If none of the five conditions occur, check: Inertia switch to ECM circuit:
short circuit to B+ voltage Inertia switch failure
You can check the Inertia switch status on the Instrument cluster Diagnosis, see http://www.bluejag.co.uk
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