So, I've enjoyed all the fun the P0638 code has to share. I had a catastrophic failure, had a Saab guru replace the ECM ($1200 repair on my $500 dollar car), and all was well. Then, the walking pace (seriously, limp home is a generous description) cruise back home. I removed the throttle body (it was actually stuck shut, had to use a mallet to pop it open), cleaned and replaced it, reset codes and was good to go. My lovely P0638 came back the very next day. I'm enjoying rough starts, bad idling, and the occasional stall. I've tried the clutch + gas hard reset start a nearly infinite number of times. I removed the battery and the damn battery cover, but can't find the mythical H42-2 connector. 2003 Saab 9-3 2.0t, 230xxx miles, Manual. I think I've read all of the applicable threads. Any ideas? Thanks in advance!