P0455 Honda -

Question

Hi
It seems like the check engine light has been forever on my car. It keeps coming back even after i have replaced all the required parts. I had 3 check engine codes P0135, P0420 and P0455 on my 2007 Honda Accord 2.4L.
I got a new oxygen sensor which got rid of the P0135 but the P0420 persisted and i had to replace the cat converter as well.
Now the P0455 would not go. my Mechanic suggested i get a smoke test done. So i got that done and replaced the fuel cap but the check engine light has returned to haunt me again. It came back with me driving just 10 more miles after the code has been reset after replacing the fuel cap.
Please advise what should i do

Answer 1

P0455 Large leak detected

This is for the EVAP system, if you passed the smoke test, this leaves you with the FTP (Fuel tank Pressure) sensor , if the sensor reads the tank pressure false and report false conditions,