well ive search.. im not even sure what and where to start..help me out ..its a stock car 00 civic ex

 

I dunno about that. Your ECU SHOULD use the 2 O2 sensors (before and after) the cat converter to adjust the fuel. If it reads rich, it leans the mixture, if it reads lean, it adds fuel. Then it uses the 2nd sensor to read if the cat is doin its job. Note that your O2 sensors fluxuate between .2 and .8 volts (rich to lean) because this allows the cat some O2 to do its job.

 

so basicly it can only be 3 things that tied into this code? .. 02 sensor,wiring,ecu correct?

 

What code are you throwing?

Ive never heard of a lean air fuel sensor

 

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