No Lambda Extender

Hi,

My car is due for a dyno session tomorrow and today when looking at the underside of the car, I've noticed I don't have a lambda extender on the second lambda sensor. I have no idea at what point this was removed. This explains why I am getting faulty lambda readings!

My question is, will my dyno results be significantly affected by this? i.e should I cancel the dyno session and rebook once my new lambda extender arrives?
 
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