BeachCity

P1502 Throttle Jacking Unit, Spring Test – Above Limit Clean the connectors, check the wiring for damage - clear the code and see if it comes back. If it does, you will likely need a new throttle jacking unit. Thanks for the quick reply, I have seen other posts where this problem manifested itself solely due to disconnecting the battery or by having the battery become low. I have also read of several other's replacing the e-throttle assembly itself without success. Hopefully someone can chime in with an actual successful repair. This is getting frustrating. I'm having the exact same problem with a 2000 Boxster S. DTC P1502 is the only code present and the symptoms are identical. After performing the diagnosis and adaptation procedure outlined in the service manual, the throttle assembly was replaced (as instructed in the test procedures) with a new unit from Porsche and the adaptation procedure was done again. There was no change in the condition, and after following the test procedure again, it (again) pointed to the throttle assembly as being defective, since (apparently) there is no other possible cause...at least according to Porsche. After doing a search of the web I've found well over a dozen instances of this happening. In all cases it seems to be related to the battery going dead or being disconnected for some reason. Some have replaced both the throttle assembly, as well as the air flow sensor - with no change. (I think I've only found one or two instances where the throttle assembly was actually defective and truly causing this problem.) There are no TSB's from Porsche addressing this issue, and no one ever seems to post the actual fix if (or when) they find it. Does ANYONE know what's causing this issue? If so, what did you finally find it to be? thanks, Erick