I run the PLX also. I used to run it with the gauge, but have since switched it to run through the power logger and to my scan master. I placed my O2 sensor right where it is in the pic below. Pic attached (stolen from an older post by TurboDave)
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SignUp Now!View attachment 293010 Is this the PLX that everyone is referring too?
I see the same on my MTX-L. 0.1 offFWIW - I notice a 0.1 difference between the guage digital reading and what the scanmaster says.
I've heard bad things about AEM, but mine worked great. It's just in your best interest to replace it annually, although it took 4 years for to go out.AEM and PLX , both work great with the PL and SM