The most common sign of an evap system problem is a “check engine” light To run the evap system leak test, the mechanics also use an advanced scan tool that can operate the components of the evap system and monitor the pressure or vacuum inside the fuel tank. Other signs include a strong gasoline odor coming from the car and/or failed smog tests
How to Fix P0442: Evaporative Emission System Leak (small leak). Test
The best way to test for evap system leaks is with a smoke machine
This device pumps harmless smoke into the evap system and allows you to see exactly where the leak is coming from.
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. A comprehensive guide on identifying and fixing evap leaks the evaporative emission control (evap) system is responsible for collecting the excess fuel vapors from your fuel lines and then sending them to engine to be burned off safely How the code p0442 is diagnosed Many automotive shops and dealers have a special device called smoke machine to test the evap system for leaks
