This Citroen Xsara 1.6 16 valve NFU engine keeps putting up code P0122"throttle potentiometer signal short circuit to earth" without any real running problems, I assume it means the remote sensor similar to many peugeot 406 HDIs, there is still a throttle cable but it is attached to the sensor, throttle is then electronically controlled, live data looks ok giving .59 volts at idle and rising smoothly and idle position is being recognised, and degrees of opening are good aslo, anyone seen this before?