Hey guys my 00 V6's check engine light stays on and has been on since the previous owner had to replace the cpu, cause the old one drained the battery. it has been on for close to three years now and not a problem with the car. They took it to a shop and it came up as a generic problem but didnt specify. if anyone has any ideas let me know. Thanks

 

Has anyone checked/replaced the O2 sensor?

 

Not to my knowing but i am going to look into it thanks for the help