2g ECU throwin code wanna make sure of sensor

[95gskid]

my 2g was throwing the p01400 code or whatever when i bought it and it says about the manifold different pressure sensor and i know where thats at.... but now its throwing a check engine light and the PO125 Closed Loop Temperature Not Reached(m/t)
PO125 Excessive Time To Enter Closed loop fuel Control... now what sensor is causing this????? the only thing i could think of was the coolant temp sensor which i think i'm gonna pick one up today at auto zone but I'd like your guy's opinions...

 

[Rilla]

ive got a PO125 now, how did you fix yours?

 

[redline2k6]

the mpd sensor is located on the top of the intake manifold, on top of the plenum it is to the right of the throttle body.