Fix code P0456 EVAP System Small Leak (0.020″) Detected
If you have a P0456 EVAP System Small Leak (0.020″) Detected trouble code, this post will help you understand what it is and how to fix it.
This is a leak in the evaporative emissions system. The code sets if the PCM detects a leak greater than .020″ but less than .040″. The PCM conducts the test twice. If it fails both times, it sets the code and light the MIL(Malfunction Indicator Lamp).
© 2012 Rick Muscoplat