Originally Posted by tcarretti

This works with the manual tranny for sure. I've used it about 5 times so far since having installed my Berk test pipes. It's a little finnicky and you have to time it just about perfectly or you'll have to start over. Just be patient, use a stop watch and keep at it. Do NOT press in the clutch as that will allow the car to start up right away.

Two pushes on the button are required to get to the ON position. Exactly 3 seconds after that depress the gas pedal fully 5 times. Come off the pedal each time. 7 seconds after the last depression, hold down the pedal for EXACTLY 10 seconds, release for 10 seconds, hold down AGAIN for 10 seconds. Turn the ignition OFF...

Start back up regularly and the CEL should be gone. There has been a couple of times that I had to go through the procedure a few times as my timing was a little off, but it finally always works. A lot cheaper than buying a code reader as long as you know why you're getting the CEL in the first place.