Lincoln/Mercury Repair: sensors, salisbury md, sensers

Question
I HAVE A 97 MURCURY GRAND MARQUES, AND LIVE IN SALISBURY,MD. A COUPLE WEEKS AGO THE CHECK ENGINE LITE CAME ON, I DISCONNECTED THE NEG.POLE ON BATTERY, AND IT WENT OUT. ABOUT WEEK LATER TOOK TRIP TO PGH. PA, AND IT CAME ON AGAIN, AND WOULD NOT GO OUT BY DISCONNECTING BATT. TERMINAL.
CAR HAS 95000 MILES. STOPPED AT GARAGE, GUY PUT TESTOR ON UNDER DASH, SAID INDICATED SENSOR, BUT DID NOT SAY WHICH SENSOR. SAID NO BIG DEAL JUST GO AHEAD AND DRIVE IT.?????
WHICH SENSOR DO YOU THINK IT IS/??? THANKS

Answer
hello james
could not tell u i would be guesing and i do not do that i would bring it back to a shop and have a diagnostiac test and ask to replace the senser what is bad . i would not want to say because thire is many sensers in your car please rate my serivice pete