Doug - re: email - the sensor is located on the front of the engine block below the intake manifold. But as Don points out, it may well not need replacement. He is pointing you to a diagnostic procedure that will determine where the problem lay.

If you want to just replace the sensor, and hope that it cures it, go ahead, but you maybe throwing good money away.

 

ok thanks guys,Doug

 

As said in post #4 check it first.