Question

P0456 NISSAN -versa how to turn off gass up over a week ago the check engine ligth came on 6 days later

Answer 1

Hi there,

The code indicates there is a small leak in the evap system. The seal on the gas cap could be bad, or there could be a very small leak in some other part of the system. I would start by replacing the gas cap and if the problem continues you will need to have a smoke test done to locate the source of the leak.