what part do i need

Question

i have a chevy montecarlo with code p0455 what do i need to buy

Answer 1

Hi there,

This code is for a large leak in the evap system. Normally the first thing to try is a new gas cap. If that doesn't resolve the issue then a smoke test to locate the leak is the next step. Sometimes the vent control valve will cause this code if it's not working properly.