2002 hyundai sonataApril 17, 2015if the gas tank has a leak will it cause vehicle emissions to show up as not ready? thank you Share Tweet Pinterest Keywords:emissions problem there is no check engine light but vehicle shows not ready for testingSonata 1 thought on “2002 hyundai sonata” Freeautomechanic April 19, 2015 at 6:16 am No. If it has a leak it will show up with an evap leak detected code. The not ready code shows up if the codes were recently cleared and the vehicle has not been run through the readiness procedure. Comments are closed.