2000 Grand Grand Cherokee stalls when started

[bgremi4]

About a month ago my jeep stalled out as I was starting it up. The rpms would jump above 1000 then down to 400 and die. I would try starting it again and the same thing happened about three times in the same day. I changed the air filter and put some fuel system cleaner in my tank and it ran fine until last week. This time I sprayed some throttle/air intake cleaner inside the air intake chamber. Still no difference. I checked the computer with two different diagnostic devices and both said the same thing. 1) p0112 - intake air temperature sensor is lower than expected. 2) p1391 - glow plug circuit low input (bank #1). 3) p0340 - a malfunction exists in the electrical circuit for camshaft position sensor "A". I assume it could not be the glow plugs since they only exist in desiel engines. Can someone please help.