i had a cel come on - took it to autozone to run the codes - front o2 sensor showed up - now i need to know how to remove the old one. I can't get a wrench at it Any suggestions? I don't have to drop the engine cradle do i?

 

If you are changing it it is easier to cut the harness off the old one and use the boxed end of the wrench 22mm. since it is offset you can get on it that way. The new one you can get tight enough with the open end. Or you can buy the 02 sensor socket at sears or autozone ect.