Originally Posted by SafeChav

If you're only installing a gauge it has nothing to do with the ECU itself

HOWEVER, as i said, a cheap air/fuel ratio gauge is useless, as they are not accurate.

You are looking to spend at least £250 if you actually wnat what you see to mean anything and/or be useful in anyway

You need a wideband lambda, a controller, and a monitoring device that will accept the wideband signal.