Camry brake pedal vibrates while in idle condition.

Hi,
I have a 2002 Camry LE with 32K miles in it.
I just did the 30K miles maintenance two weeks ago.
After the maintenance, the brake pedal starts to vibrate when I push the brake pedal while in the Drive gear and in stop position. For example, when we are at the red traffic-light waiting for the green light.

Sometimes the pedal vibrates pretty hard, and my leg becomes uncomfortable after driving it.

Does anybody have any idea what might be the cause?
And what should I do now?

Thank you for any input.

Andy
andy_tan_2002@yahoo.com Does the steering wheel also vibrate? You say this is at idle and NLT while the car is under way. I would assume this vibration is caused by a low idle speed setting, and if you have a tachometer on your dash you can confirm this if the idle speed is below 750 RPM.

I would first look and listen under the hood for a vauum leak or a loose vacuum hose connection somewhere. I fyou do nto see anything you might want to go back to the mechanic who did the 30K maintenance and have them double check th eidle speed for you.

Keep us posted as to what you find.Car Repair Talk's forum.