An evap leak means a leaking evaporative emission control system The code p0442 indicates that the engine computer (pcm) has detected a small leak in the evap system Also, a trouble code indicating an evap leak tells you there is a problem with the evaporative emission control system
Evap Leak Codes
There are many parts that make up this system, so it’s imperative to read the diagnostic code fully.
In almost every case, the presence of an evap leak will lead to the illumination of a check engine light and logging of at least one active diagnostic fault code
Some of the most common evap faults logged under such circumstances are p0440, p0442, p0455, p0456, and p0457 Evap system failure is a common cause of the check engine light Learn what it means, how to fix it, and how to avoid costly repairs. Find all 6 ways to detect an evap leak, discover how long you can safely drive with one, and learn what an evap leak is in your vehicle's emissions system.
Your check engine light is on The evap system is a core component of the engine’s emissions system, so if there’s an evap leak your check engine light should come on. Evap system leak repair cost & how to fix patrik balent updated on july 28, 2023 if you’re reading this, chances are you’re dealing with an evap system leak in your vehicle The “check engine” light is on, and the diagnostic code indicates an issue with the evap system
But you’re not quite sure what exactly that means or how to fix it.
As you drive and conditions allow, the engine computer (pcm) tests the evap system for leaks by monitoring pressure or vacuum inside the system
