P1125 and 1126 codes

[mukilteofred]

P1125 and P1126 OBD code on 2003 Mini. Rough idle and dying. With the following codes P1125 and P1126 “Throttle potentiometer 1 and 2 measuring range or power output problem” (minor fault) and the 1126 (major fault). I changed the throttle module and reset the code using the iCarsoft scan tool. Had to reset a couple of times. The car ran fine after that. 4 weeks later EML light came on. Pulled over and got the P1125 code again. Reset with the scan tool drove another 40 miles with no problems. Starting car after 8 hours park time and the code came back. Reset drove home and parked. Next morning car will hardly run and dies at idle with code P1125 and unable to reset.

[Luccia at Pelican Parts]

Hello there - first, is your '03 MINI a Cooper or a Cooper S?

P1226 Throttle - malfunction (flap malfunction)
P1125 Throttle - valve potentiometers 1 and 2 - measuring-range or power-output problem

When you got the EML light you only were throwing P1125? P1126 is not present at this time?

I have seen these items below replaced before for these 2 codes/issues:
13-54-7-509-043 Throttle Housing AS
12-51-7-520-939 Wiring Harness

Since you already replaced the throttle housing, it may or may not be related to the harness. You'll want to dive into that problem area a little more and see if it is possible that it's your cause.