I have an evap canister code and the shop i took it to said there are too many components to know exactly which part is triggering it. If i take it to Nissan, they will probably void my extended warranty because of my y-pipe and muffler. What can i do to find out what the problem is? What thing i did notice is that the car burns a lot of gas.

 

Which code are you getting? Number?

 

If you have a front strut tower bar, check your EVAP (little round plastic thing I can't remember what it's called right now) does not have a break right under the FSTB and by the throttle body.

 

I got the code 01 11 and meineke got the code P1440.

Could my y pipe have an effect on it?

 

I don't have a front strut bar

 

that would be a really good reason as to why my EVAP codes keep coming and going all the time i hate that

 

0111 is the EVAP system "jackpot" code meaning it points or one or more components or the EVAP system system.

Possible causes include (BUT NOT LIMITED TO)...
- EVAP canister purge volume control solenoid valve stuck closed.
- EVAP control system pressure sensor and its circuit.
- Loose, disconnected, or improper connection of rubber tube.
- Blocked rubber tube.
- Blocked or bent rubber tube to MAP/BARO switch solenoid valve.
- Cracked EVAP canister.
- EVAP canister purge volume control solenoid valve.
- Closed Throttle Position Switch.
- Improper connection of one-way valve.
- Blocked purge port.
- EVAP canister vent control valve.


Also, a y-pipe will not trigger the 0111 code.

 

but will this make me burn more gas? And do i have to take it to Nissan to find out which component is failing?

 

You can test the various components yourself. You'll find all the info (location of the various components, testing procedures, etc.) in a factory service manual. Hayne's repair guide will cover some but definitely not everything. Good luck.

But for now, reset the CEL, and see if it comes on again.