This sounds crazy but my wifes 04 LS kills about twice a month in the hottest months of summer when sitting in traffic with the A/C on for past two years but runs fine every other time of the year. Got a code P0606 and brought it to local shop who says it's pointing to the pcm and that it might need to be reflashed at the dealer. Hate going to the dealer who would probably want to sell a new pcm, any input would be appreciated. Can a pcm malfunction only when the temp. is over 95 degrees?