I have a 2002 kia Sedona ex. I have no heat and the engine overheats. I have changed the thermostat and it still has no heat and continues to over heat. Any help to figure this out would be greatly appreciated. Thank you Rob.

SOURCE: kia sedona 2002 error code P0118

P0118- (ETC) Engine Coolant Tempature sending unit, high input. Your ETC is either faulty or has a poor wiring problem. Thank you for using fixya.com

SOURCE: NEED TO CHANGE THERMOSTAT ON 03 KIA SEDONA. INSTRUCTIONS?

Here is a link:
http://wiki.answers.com/Q/Where_is_the_thermostat_and_how_do_you_change_it_on_a_2003_Kia_Sedona

SOURCE: 2002 kia sedona 3.5l has rough idle replaced plugs wires and coil

this vehicle has coil packs for the ignition correct? have you ran the engine at night with all surrounding lights outs so its really dark. spray a mist of water on the coil packs and spark plug wires to see if you have spark/voltage leaks jumping out from them. sometimes the tiny sparks will be so fine and skinny you can barely see them so it needs to be dark. hope this helps your trouble shooting. a coil pack could have such a fine crack for the voltage to leak from that you cant see it.

SOURCE: what size tires fit a 2002 kia sedona

Walmart would be able to give you the CORRECT tire size

SOURCE: Kia sedona. Knocking sound from Engine

I assume by now you have this problem fixed, but if not, or for the benefit of others looking for help, try replacing the coil on the #5 cyl as well as the injector. Ours did same thing, except fault code was on #2 cyl, so I got the parts from local parts store for about $150 total, and completed the repairs myself on my wife's 2003 Sedona. Now i can start on the rear heater issues, the knocking sound coming from the LF tire area while in motion, and replacing all brake pads. 92,000 on the odo. I'll spend the extra $ and go with the Honda Odyssey next time.