Confirmation needed ...

[Alchamist]

Hi guys,

This might sounds daft, but can someone confirm (as in by experience) if a disconnected lambda sensor makes the EML light come on please ...

[Road Hog]

Hang on a moment will unplug wifeys & see

[Road Hog]

Tigra B with precat Lamda NO warning lights when disconnected with engine running Can somebody please try it on an A series to make double sure

[Krusher]

Lambda sensor is the one in the exhaust just before the cat YES/NO?

[Road Hog]

Yep thats the kiddy

It will probably give you a lumpy tickover when disconnected but will not harm anything in the short time

[Krusher]

In that case, No if disconnected it does not put on EML on X20 engine

[Road Hog]

Cheers bud,

Jay,I think it only shows EML for post CAT Lamda,on more modern Vx it has a seperate Emissions light for non critical faults

[Alchamist]

Hmm, dagnammit. Thought i might have been getting a step closer to finding the fault with mine. Back to the drawing board I go ...

Thanks for checking guys - I really appreciate it. Every other sensor throws the light on when disconnected, and as I get the "oxygen sensor low voltage" error, so thought I might have been in the ballpark at least!

[Drift]

The light deffo will come on with it disconnected, Ive done it on my old sport.

[Alchamist]

Ok, now i'm confused!

Are we saying that on the C20NE engine, the EML light should come on if the lambda sensor is disconnected, and can we verify that at all please?

[4x4 bobby]

I did and Alex agreed with me !

[Alchamist]

[Road Hog]

[4x4 bobby]

[alex]

Perhaps the cable or loom from it could be impinged.

[4x4 bobby]

[Alchamist]

Impinged? Sounds painful!

This is why I wanted to check to see if the EML light should come on with the sensor disconnected - as if it's not registering the disconnect, then there could well be a short along the line, which would also explain why my engine is running exceptionally lean.

[Alchamist]

[4x4 bobby]

[Alchamist]

The sensor is brand new - and with the fact that the ECU is not picking up the disconnect, then I am leaning more towards the wiring, and it was doing the same with the original sensor as well