first off i want to let everyone know that i am new to the forum. I have a Civic 2000 went to get my car smogged rep said that the o2, htr, cat and evap was on monitor. Drove a tank full worth of gas and went back and said the same thing all on monitor. hooked up my buddies scanner sure enough all on. Drove about 60 miles street and freeway buy the time we got to our destination and before we shut off the car they shut off. we shut off the car hung out for a couple of hours came back fired up the car and for ***** and giggles hooked the scanner up again and again all on monitor again. need some advice
Thanks

 

"On monitor"? Do you mean they're throwing CELs?

 

No, it does not mean the car is throwing a cel. OP, try a drive cycle like this: http://www.lyberty.com/car/drive-cycle.html

learn http://www.autotap.com/problem3_failed_emissions.asp

 

Any mods to the car or ecu?
Check the backup fuse under the hood?

 

This^

It may be blown.

 

sorry for taking so long to reply back, I will check the fuse an let you guys know
@hondapartshero no mods to the ecu stock