Whats going on, i just replaced my primary o2 sensor and replaced the cat with a high flow. i have an auto meter air/fuel gauge i want to install but not sure which wire on the o2 sensor i have to tap it to. Which color on the o2 sensor is the signal wire? some people said to tap it to the signal wire near the ecu and some said to tap it by the o2 sensor. does it matter? 99 civic em1

thanks

 

the white wire is the signal. as long as you getting a reading you'll be ok

 

Cool, thanks for the help