the code is 52, so looking here:
http://www.cygnusx1.net/Supra/Librar...ion=FI&Page=28 gave me a Knock Sensor Signal. apparently, it could be either of the two knock sensors or the ECU. and i know theres a post around here with the knock sensor locations, i posted on it yesterday...got it.
http://www.toyota-supra.info/forums/...ead.php?t=6577
im not a supra wizard, so thats all i know haha, maybe someone else will post here with more information on what it could be. thats a start though.