Check engine light on P1456

Question

Should this be fixed immediately

Answer 1

Hi there,

This is sort of a catch all for an issue with the evap system. The computer can't tell what the problem is exactly so it throws this code. This doesn't have to be repaired right away and should not affect the way the engine is running. I usually find the problem to be a small evap leak on the O ring for the vent control valve with this code.