2000 3.0i Windstar P0340, bad idle, bad low-RPM

Hi folks, I have some troubles with friend's Windstar. His PCM got P0340 code which is the Camshaft sensor. So Ford service changed the sensor itself, sparkplugs, checked the wiring twice. The code appears after 20km.

I have checked the Camshaft sensor's alignment which is precize. IAC idle valve is OK, coil pack as well, no leakage in vacuum system. Alternator was changed cca 1000 miles before.

Thanks for any hints, this looks strange...

I would have him return to the FORD service department.....they should at least look at it for free as they just worked on it.
Make sure that it is the SAME code that is coming back.....and not a different code.