Also, a trouble code indicating an evap leak tells you there is a problem with the evaporative emission control system. The evap system itself features several key components, including the evap (charcoal) canister, fuel tank, fuel tank vent, and evap purge solenoid Learn how to identify and repair an evap system leak in your vehicle 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. Learn what the p0455 evap code means, common causes of large fuel vapor leaks, and how to diagnose and fix them Stay safe and drive smart.
P0442 evap system leak detected (small leak) Causes, symptoms, diagnostic the purpose of the evap system is to prevent fuel vapors inside the fuel tank from releasing in to the atmosphere Read how the evap system works below The evap system is sealed. A faulty gas cap (loose, cracked, or with a worn rubber seal) breaks this loop, allowing vapor to escape and causing the car’s computer to detect a large leak (p0455).
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