Hey guys I need my car to pass smog i recently failed due to the OBD reading 3 incompletes being O2, EGR, and catalyst, emissions wise the car passed perfectly. I recently drove about 300 miles hopeing that the computer would clear but no luck. Any tips or advice on what I can do? Thanks.

 

If you reset your battery, you will have to to do all the requirements for drive cycles. You can look in the manual for each. Look in the diagnostic section where the codes are. It should be at the bottom of the codes, or look at each code for the 3.

N

P.S. What yr. Evo?

 

Its an 04, i dont have a manual for the car either, i bought the car a few months back. Also I have not disconnected the battery or anything. Today I cleaned my MAF cause I read somewhere that can help so maybe tomorrow it will help, but well see.

 

Do u still have a cat on the car ? If not and your running a test pipe or a gutted cat then it could be your up stream o2 sensor and what I did to "fix" that was buy a spark plug non fail kit and drilled one of the two nuts so that the head of the o2 sensor will fit threw it and then you take the other one and thread it on to the one u drilled out and then thread it back in to where your o2 sensor would go what this does is not allow the o2 sensor to read as much exhaust gases so in turn I thinks the cat is still there