I have a 02 ex Civic but a air fuel gauge and was wondering if I hook up to my stock O2 sensors is it even going to read I've only hooked up to my top sensor and only get a reading of 20 was going to hook up to my down stream O2 sensor figured I'd ask first I have to get a air fuel gauge O2 sensor that's compatible correct my stock narrowband will not work on the gauge

 

your gauge was made for wideband use ONLY.

 

Does your air/fuel gauge support narrow band? There would be 2 separate inputs? If you changed you o2 from a wideband your ecu would throw a CEL.