Code P0446，从哪儿开始检查？

Lexus RX 300. 135,000 miles

From scan report:

P0446 Evaporative Emission System Vent Control Circuit

Code P0446 indcates a fault in the Evaporative Emission System Vent Control Electric Circuit for a predetermined period of time.

Suggested Parts

Vapor Canister

Vapor Canisters can become fuel soaked for a number of reasons. Before replacing, determine and repair the cause of the problem.

所有跟帖： 

• 你是不是加油经常top off? -biglow- ♂ (0 bytes) () 03/26/2016 postreply 09:01:24

• +1 -soccer88- ♂ (0 bytes) () 03/26/2016 postreply 09:15:47

• 99年的RX300很大可能是EVAP系统有漏气，什么cap，hose，hose connection等，不过堵了也不是不可能， -Oneshotkill- ♂ (285 bytes) () 03/26/2016 postreply 09:37:22

• 这个挺不错，看看 -soccer88- ♂ (779 bytes) () 03/26/2016 postreply 09:53:15

• 这个可不好查，整个系统管路，阀门很多，都有可能有问题。 -nonego- ♂ (114 bytes) () 03/26/2016 postreply 13:08:12

• 大概是EVAP Canister -其其- ♂ (151 bytes) () 03/27/2016 postreply 08:06:22