Electrical warning light any ideas??

[Ade T]

So... i was driving home before and a warning light came one and went into limp mode. I pulled up at home turned it off and back on again and the light dissappeared :S Any ideas guys? See below for a picture its the one on the left. In addition the idle is lumpy but not sure if thats related? Any help is appreciated

 

[Trev.]

"probably" a pre lambda sensor

 

[Ade T]

Is that the light that it throws when the 02sensor is at fault then?

Just found this sensor thats snapped off? What is it? (located just above the oil filter)

 

[Trev.]

That aint a o2 sensor, your 2 lambda sensors are underneath the car on your catalytic convertor, someone else may confirm what that is but it will be that if its snapped off!

 

[Ade T]

yes I know about the 02 sensors I didnt know which warning light appeared when it was faulty.