19 16v

[coleman]

right can sumone tell me if that sensor right before the cat on the exhaust is needed?please

 

[steve a]

Yes thats the lambda sensor.

 

[coleman]

wot is it needed for mate?

 

[BenR]

It monitors and is the basis of closed loop running.

It provides the ECU with the effective a/f ratio of the burnt gasses through oxygen content.