So I have had this problem for a while, but been traveling so much I havent been able to address it.

Only 25K miles on an '04.

So a while ago I got a CEL, cant remember the exact # but it was in reference to the neutral position sensor.

At idle in neutral the RPM will go up and down. From like 750 to 1250. Constantly without stopping. It will stop if I barely press in the clutch. Sometimes, very seldom, if I move the stick through the gears it will stop.

It seems that I have a faulty sensor in the transmission to detect it is in neutral. But I have looked through the schematics and can not quite seem to find what I need to replace or inspect.

Its code P0850...
just replaced my nuetral position swith last week and ran better few a few days,,,, threw the code again and need to go and get it looked at,,, I put a remote starter on my car so thats whats causing my headaches now, but yup this is a common problem...

Any information on where it is and how to replace?

Not positive but I think it located on the tranny, drivers side. Shouldnt be too hard to replace. disconnect the connector, take out sensor; usually get take out a 1 or 2 screws. install procedure is reversed.

Thanks, I found that info when searching the engine code.

Funny thing is it doesnt throw a code now, but still presents the behavior.

I will check my warranted status.