for the evap try changing your gas cap. most likely a vacuum leak. as for the catalyst code if its reading catalyst below threshold you need to change the catalytic converter. that's most likely your problem if you have changed the down stream o2 sensor.
O2Sensors. either need to be replaced, or tuned out.
No, it must be repaired and/or replaced.
= "Do you have to flash the computer after you replaced the engine?" =
There's no possible way to pass inspection with a bad catalytic converter, if if you find out you have a bad catalytic converter during your inspection you have a chance after you after you have replaced the catalytic converter and the inspection no no charge/free!!
Because many people poo on other people's heads so the catalyst becomes nice and shiny so it doesn't need to be cleaned... Simples !:D
No, it is illegal to remove a converter and not replace it.
The computer can be reset using an OBD-II code reader/diag unit. If the light returns then the code must be read to determine the real problem. Run1 When the battery has been disconnected or replaced, it clears the on board computer of all errors and all data. The inspection station uses data from the OBDII computer to check if the car is within compliance, so when the battery was replaced all the data was cleared. You will need to drive the car roughly 50 to 100 miles so the computer can read all the sensors on the car to see if they are in good working condition or give you another "Check Engine Light".
He was sacked and replaced by a computer.
It means that the catalytic converter is not performing to specifications and should be replaced.
computer
computer
Nothing yet.