Sometimes the old O-ring was left down there when you pulled the bad CTS off and forgot about it. You can use your finger to feel the ring down the hole there . Just make sure don't left the old one there, because your new CTS comes with a new O-ring and that ended up 2 O-rings installed and the sensor may not be right like that.

 

Found d problem!!
Thanks everybody for replying. I guess while I was pulling d plug while replacing d old sensor I must up pulled it by d wires a little hard n one of d wires came out of d plug. I put it back in d plug n cliped it back in d sensor n back to normal once again!!!
Now I could finally enjoy my baby with no worries n I could wait a lite longer to replace my timing belt since $$ is a little tight right now :-( but I'm definally doing it b4 summer ends! Thanks again 4 ur help guys!!!

 

congrats! glad it didnt end up costing you an arm and a leg.