P0446 CADILLAC – Evaporative Emission Vent System Performance

 

P0446: DIY Repairing Video Tutorial

https://youtu.be/_kSt_AnkgGQ

Check out nonda Auto DIY Center for more engine error code repairing videos.
https://www.youtube.com/playlist?list=PL-Lyko0O0oxHe1AGvzwAz-wokJPXAtW97

 

P0446 CADILLAC Possible Symptoms

  Engine Light ON (or Service Engine Soon Warning Light),Possible a noticeable fuel odor caused by the release of fuel vapors  

P0446 CADILLAC Possible Causes

  Plugged vapor canister,Faulty vent solenoid,Pinched or blocked EVAP hose,Faulty FTP sensor  

P0446 CADILLAC Description

  The Powertrain Control Module (PCM) monitors the performance of the Evaporative Emission (EVAP) system by applying a predetermined level of vacuum to the EVAP system then monitors the vacuum decay rate.