Hi guys
I have 2005 G35 coupe. Couple days ago I did obdii scan I got those things
CAT, EVA, O2s, HTR. Can you help me with those codes.
Thanks alot

Those are all codes related to your emissions system, particularly the drive cycle tests. Those codes mean the test systems are not ready or have failed ...

Have you done anything to your car recently?

Hi xdEnbOyx
Thanks for replaying. I have done nothing to the car except the push to start system. Other than that nothing.
Do I have to worry about those codes.
I thank you for your valuable time.

Those codes generally aren't serious, it's saying that the drive cycle testing systems aren't ready. The ECU conducts a series of tests that make sure your emissions system is ready (driving cycle tests). I suspect your new push-to-start affected the ECU and cleared the tests, so you now have to run your car for a certain amount of cycles for the tests to be complete. I'm unsure of how many cycles that is, but here is a link showing you the process.

http://my350z.com/forum/maintenance-...ive-cycle.html

After that you can just have the codes cleared and it should be good to go.

This happened with an older car I used to drive. The cats went bad and I had to get new ones, and the same codes popped up for me. All I did was have the codes cleared and drove it around for a while and I was good to go. Be sure to perform those steps, otherwise you will fail your smog test.