Berryman part #0212 is designed specifically to help pass emissions tests. Just add one bottle to your gas tank to clean fuel injectors and intake valves ad well as improve for a cleaner burn. Then fill up with gas, run about 3/4 of the tank out, and get your emissions checked. Best of all, it has a money-back guarantee if there are no mechanical problems with the car and all the emissions controls are connected and properly functioning.