I have a 2005 Focus the issue I am having is that the throttle only seems to work up to 1/4 of the way down, if I put it to the floor it makes no difference, it still accelerates as if I am pushing the throttle down a quarter of the way. At highway speeds the car will accelerate slightly while I have the pedal held stationary, in the same spot and I have to let off to stay at the same speed. It has a check engine light that is giving me the code P0122; for "Throttle/Pedal Position Sensor A Circuit Low Input". I tested the sensor and there were no dips in the voltage. I used a digital voltage meter that read through each .01 of a volt throughout the test smoothly. The line to the PCM gave me 4.9 volts. I have replaced the sensor 3 times. First with one off of my zetec. Then I tried an autozone one with no luck. So I tried one from a local junkyard thinking maybe it had to be an oem part and still nothing. None of the sensors changed the way the car drove. I don't know where to go from here. Any help would be greatly appreciated.