Throttle Position Sensor

Hi all!
I have been having issues with my jimny. i had an overheating issue, fixed by replacing radiator and thermostat(dont know which was the problem but replacing both fixed it) it only overheated once before i went to fix it but it seems to have done a bit of damaged. one of my ignition coils was burnt so i replaced that but i have an error code, P0121, throttle position sensor, to try fix this i replaced the sensor, cleaned the throttle body and put a new throttle body gasket on. this hasnt resolved the issue at all. it still is extremely underpowered at high revs(not revving over 3500 when im on the motorway) and not being able to accerate past 85kph (50mph). i back probed the sensor when it was plugged in and seems to climb normally. but when its plugged out the sensor wire has 2 volts, this should be 0? the live wire has around 5 volts and the ground has 0. ive had the TPS unplugged for a while but i know this is only a temporary fix, i plugged it back in today and its gone into limp mode. its an m13A engine on a 2008 jimny.

Welcome to the forum. The replacement sensor, is it genuine or an after market ebay special? These can be quite fussy about sensors.

Hi Lambert, yes i got it off Autodoc, its an" Alfa e-parts" brand. but looks exactly the same as the old one. i have a second jimny im restoring aswell but the engine on that oone is fine so ill try putting the TPS from that one in and ill report back. Thank you

i broke this sensor trying to get it out .. rookie move i know. but when i had it out i was able to see that the readings going to the plug without the sensor connected are the same as the jimny with a known good TPS system.. so my problem is with the sensor and not the wires going back to the harness? would my best bet be now going to the motorfactors and asking for a genuine oem part? Thanks

Have you looked how to do calibration of the sensor 
Ai is your friend can be done with multi meter or buy pressing the pedal 

hi jack, yes i tried calibrating it, i seen on a video that with the ignition on you slowly press the accelerator pedal in and then release it slowly and repeat this process a few times but it didnt make a difference. do you have any idea how to calibrate it using a multimeter?