It is a 2000 model Camry 4-cylinder, 115K miles. Yesterday afternoon the engine stalled at driving speed for a couple of seconds. Lost power steering in a turn, felt like the car slid sideways - but it was a dry concrete road with good traction characteristics- after a very bad moment everything was fine. Then about an hour later pulling out of a mall parking lot into traffic the engine missed-hesitated-or whatever again 3 or 4 times in quick succession while I was trying to enter and merge with traffic. This time there was a check engine light. This morning I went by AUTO ZONE and had the codes checked, no 'Check Engine' light or driving problems this morning. The tester showed code
340 still in the computer, "Camshaft Position Sensor." Cost $249.95, no other information.The questions are: where is the sensor in the engine, is this likely to be loose or corroded wiring connectors, how difficult will it be to remove and replace if that is necessary?