The most common sign of an evap system problem is a “check engine” light Depending on where the leak is in the system and whether or not there is another damage, you can expect to pay up to $600 or so to fix a leak in your vehicle’s evap system. 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 and Replace EVAP Purge
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.