Hi ...I'm new to this forum and in fact posted elsewhere but maybe posted in the wrong place. I need a few answers if anybody can help. We just recently bought a 2001 grand caravan sport and yesterday the malfunction indicator light came on. I figured out how to run the self diagnostic test and got the error codes p1684 and p0240. I understand the first one although we have not disconnected the battery and all I can find on the second one is turbocharger boost sensor 2 performance which doesn't tell me much. Any help would be appreciated. THank You!!!