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I just noticed that my 4x4 Sapph has a plug in the turbine housing next to the standard lambda sensor. Can this be used for a second (wideband) lambda sensor? Or does it have a different purpose?
Stole a picture from somewhere to show what I mean. The normal lambda sensor goes where the hexagonal bolt is, but the plug with the allen key hole is not used. Can it be used for a second lambda sensor?
Most of them tend to be in the down pipe and you can just buy weld on lugs. If that thread is the same as a lamda and it sits in exhaust flow then you could use it.
Lambda sensor
