Hi guys i have had 2 of these focus st with the same fault each time (throttle pedal track e or circuit b) comes up. The fault is not the throttle pedal it is the battery on the car which is weak. both of ours had no starting issues at all but when tested both failed the battery test. apparently on cranking the voltage drops too low and flags a throttle pedal fault code.
but if anyone wants to buys a perfect used ford throttle pedal just let me know as i have one

sean