My daughter drops off this car....... 03 Sonata with the 4 banger to be exact, and it keeps cutting off when it hits 3rd gear. I take it for a test drive, and sure enough 3rd gear kills the engine. Drive in manual mode and all is fine.... for a while. Hooked up the scanner and it tells me the MAF has a high voltage condition. Cleaned the MAF and drive again. Same thing. This time it pulled a crank and cam sensor. Cleared the codes and drove some more, only to have just the cam sensor pull a code. Replaced the cam sensor and no change. Now it pulls the MAF again, I unplugged the MAF and now it shows MAF low volt (duh, it's unplugged) and IAT, Cam, Crank sensors

I know that with search, it is usually the crank sensor, but this thing has me stumped. How can a bad crank sensor cause all these unrelated codes? I need a definitive answer soon as it might go to the shop first thing Monday as I just don't feel like messing with disassembling the front half of the engine

I think you should take a look at the elect. diagram and see if all these sensors have a common point somewhere, ground or common connector. Maybe a wire is opening or shorting with eng torque. A cranksensor usually sets a code by itself, Po340 I think. What are the exact codes you are getting?

Not sure of the codes, daughter was impatient and wanted the car in the shop. Will know more later today. Car has 85K on the clock so it is getting a new timing belt anyway as I have limited diagnostic tools for these new fangled computer controlled cars (IMG:style_emoticons/default/thumbsup.gif) . I'll let Y'all know the outcome.

Got the car back late last night and the Mech said that the timing belt had "a bit too much play" as in about 2 1/2" of play. He was amazed that it still ran. All fixed and running smooth.

Yeah, loose timing belt, I always tell people they should inspect and adjust the TB every 10k miles. It's like the best kept mechanics secret how these babies stretch out. I have a couple of cars that I replaced the timing belt, and wondered how the thing was still running is was so loose.