Technical P0039 Turbocharger Bypass Valve Control Circuit Range/Performance

[tomharrison]

Had this code popping up every now and then, keep wiping it and comes up every 100 miles, then goes after about 20, any ideas?

 

[RobW]

i would look at the boost sensor to start with

check the connections

 

[tomharrison]

is that the little unit at the front of the engine bay with 3 wires coming from it?