Helpful Automotive Resources
P0456 Code: Evaporative Emission System Small Leak DetectedDiagnostic trouble code (DTC) P0456 stands for “Evaporative Emission System (EVAP) Small Leak Detected.” Your car’s computer may set this code if it determines that there’s a minor leak somewhere in the evaporative emissions control (EVAP) system.
Can a Loose Gas Cap Turn On The Check Engine Light?You’ll often hear people say the check engine light is nothing to worry about—it’s probably just a loose gas cap. While it’s true that a loose gas cap can trigger the check engine light, there are countless other reasons why the light might turn on.