o.k....I wired up my gauge today and its not working I know I wired it up correctly. Red to ignition switch, purple to 02 sensor, and black to ground. First off my car has been throwing a code of the O2 sensor, so I replaced them both with the universal bosch and wired them straight to the ecu, reset ecu, code still there? plus the guage still doesn't read anything this is just 1 small problem I've had since I got the car running awhile ago. Its a crx si w/ b16a SiR. Any tips please, I'm so fustrated with this POS. help!