corsa c tps

[gsr600]

where is the TPS sensor located on the corsa c petrol - is it on the throttle body behind the plastic cover held on by spring clips??
& how much does 1 cost

eml on & code p1120 - revs to 3.5 -4k fun to drive.
t.i.a.

[gsr600]

throttle position sensor !!!
different to accelerator position/pedal sensor, which is gonna cost me �103 plus fitting - non refundable if it ain't the fault,.
then we proceed to the TPS, which is a complete unit with the throttle body �200 plus.