aem wideband was working perfect. Shut the car off came back out thru next day and at start up it will read properly for a few sec but then drops to complete lean. I get the --- across the screen then under some load it will pick up again but as soon as your out of the gas just cruising it goes complete lean again --- and at idle same thing. I'm assuming the sensor needs replaced but just trying to confirm before I spend the money.

 

 

I had a sensor go bad on my plx wideband and it was doing the same thing yours is doing. put new sensor on and I was good to go.