2 digit codes.
http://www.thorssell.net/hbook/2digit.html
12 Idle Speed Control motor or Air Bypass not controlling idle properly (generally idle too low)
Check/clean/change IAC valve.
22 MAP (vacuum) or BARO signal out of range
Check/clean/change MAF sensor
35
EVR - (O, R, M) EVP sensor signal is/was high
PFE - (O, R, M) PFE sensor signal is/was high
Change DPFE sensor.
39 Transmission Torque Converter clutch not engaging
This sounds bad but if it were my car, I would try changing the ATFluid first.
58 Idle Tracking Switch (ITS) signal problem
Vane Air Temperature (VAT) sensor out of range or open
Check/clean Intake air temperature sensor
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=trouble&Number=1264903&Forum=trouble&Words=iat%20sensor&Match=Entire%20Phrase&Searchpage=0&Limit=25&Old=6months&Main=1264901&Search=true#Post1264903
and this
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/ca/f8/0900823d801bcaf8.jsp
65 Check intermittent HO2S (signal or ground)
Check and clean O2 sensor connectors.
How tos in Duratec Maintenance FAQ
http://www.contour.org/ubbthreads/showflat.php?Cat=&Board=v6maint&Number=958650&page=0&view=collapsed&sb=5&o=31&fpart=1
and Autozone
http://www.autozone.com/servlet/UiBroker?ForwardPage=/az/cds/en_us/0900823d/80/1b/ca/f8/0900823d801bcaf8.jsp
