Have you had the ABS/ESP codes read?

I'd advise getting all the codes read (engine ECU, ABS/ESP) on a Ford IDS, this will give the correct fault codes and descriptions.

Ambient temp sensor is behind the front bumper in the centre. (bumper needs to be removed to access)

U codes are faults over the can-bus communications network.

If it was throttle pedal/body you'd have a throttle body/pedal code.

According to ETIS Pre 2/2006 had EGR valves, it's inbetween the coil pack and throttle body (if fitted).