Ok, here's what the codes mean (see if I can get something to be cohesive here).
P0102 is a code for your mass airflow sensor. Check the wiring, make sure it's good. However, it is a 2000, they had issues with that year, may be best to replace.
P0113 is a code for your intake air temperature circuit. Sensor's probably bad, car is in base settings mode.
P0725 is a code for engine speed input, meaning that particular sensor is not sending the proper signal. Will wreak havoc all over the place in an a/t car.
P1780 is a code for your transmission control switch.
I could not find p1850, but it sounds to me that you have some transmission issues going on. When you changed the filter, did you use the right fluid and filter? Could be low, search around, there's the proper procedure listed online.
I'd also get to the bottom of that maf code, that'll cause problems as well.
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Wednesday, September 16th, 2009 AT 7:56 AM