tps and app question HELP!!! im confused

[datguysaL]

are the readings for the TPS-throttle postion sensor and the APP-accelerator pedal position sensor, should they be similar at all times??

my 07 tahoe 5.3L, got a code and check engine light is on, so i hookd up the ethos scan tool and i got code for tps and or app. so i monitored the readings for both. truck is drive by wire.

i noticed that the APP reading changes accordingly as i press and release the gas pedal, from 0 to 100%

on the other hand the TPS reading stays at 25% and when i press the gas pedal it goes accordingly up to 100%.

tps lowest reading is 25% and sometimes 18%. at idle
tps lowest reading with the truck off is 23%.

shouldnt my tps reading move according to my gas pedal from 0% to 100%??

im thinking the TPS is bad, but then again im also thinking shouldnt it be over 0% at the tps cuz otherwize it wouldnt stay on at idle, am i right or am i just thinkin too much into this??

im usually hiding out int he squarebody section. LOL