Removing an o2 sensor?

[OpelTSi]

I am trying to remove my 02 sensor on my 91 eagle talon.
Thursday I replaced my oil, fuel filter, air, spark plugs and wires and had my fel injectors flushed.
I cannot get the car to run a steady 6x rpm without the check engine light coming on.
I have one of those ####ing haynes repair manuals that tell me how to check it.
I CANNOT GET THE PLASTIC ATTACHMENT APART.
I have pulled it, tried a screw driver. Does anyone know the trick to detach my o2 sensor so I can test it?

 

[ilco187]

the connector on the trans side you gotta pull up on the tab and then pull apart.

 

[OpelTSi]

the connector on the trans side you gotta pull up on the tab and then pull apart.

I am trying, but its not wanting to budge, any ideas?

 

[1992awdlaser]

Use a screwdriver to GENTLY pull up on it while you pull it apart with your hand that is not holding the screwdriver. If it doesn't come out, pull harder.