How many Lambda sensors . . .

[Helmac]

does my 172 RS 2002 have ?

Any ideas ?

Can find the one at the front but keeping reading about rear ones.

If I have two, which one is most likely to cause my emissions light to be permanently on ? And also cant that cause me to be in LHM with the EMW light on too ?

MPG is sitting around 33 to 34.

Thanks,

 

[Damo_Sport]

one before cat, and one on the cat itself?

 

[JackJack]

2 One pre cat (upstream) and one after cat (downstream)

Lots of things can cause limp home mode, Id change the first one if i was you.

 

[Helmac]

Thanks for the replies.

In your opinion would a faulty lambda cause limp home mode ?