You don't have an owner's manual? The directions about how to test it are in there. It's easy, IIRC, you simply start the engine, allow it to idle, then press and hold down the button and check the reading on the gauge there under the hood. The button/gauge is right behind the driver's side headlight. Go check your owner's manual, it's under routine maintenance. I have seen where those filters were damaged and the filter filled up with leaves or water, but you'd know it because it wouldn't run right.
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Moderating everything now, let me know if I can help.
Originally Posted by the user formerly known as ZX3_Chick
You're special aren't you.