A***o
发帖数: 351 | 1 请教是什么问题，能自己修吗？ nissan quest.
多谢，多谢 | j******4
发帖数: 6090 | 2 去你妹那的autozone先免费把这个code读了，然后跟小二随便聊聊看他知不知道什么，
然后再回来到网上查信息。 | A***o
发帖数: 351 | 3 code P0447, This what I found on website.
Possible causes
- Purge Control Valve harness is open or shorted
- Purge Control Valve electrical circuit poor connection
- Faulty canister vent control valve
Tech notes
Before replacing any parts, check for damage EVAP canister and for loose
hoses from the vent control valve to the canister.
Help with this
When is the code detected?
An improper voltage signal is sent to Engine Control Module (ECM) through
Evaporative Emission System (EVAP) canister vent control valve.
Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0447 Description
The Evaporative Emission System (EVAP) canister vent control valve is
located on the EVAP canister and is used to seal the canister vent. This
solenoid (the EVAP canister vent control valve) responds to signals from the
Engine Control Module (ECM). When the ECM sends an ON signal, the coil in
the solenoid valve is energized.
A plunger will then move to seal the canister vent. The ability to seal the
vent is necessary for the on board diagnosis of other evaporative emission
control system components.
This solenoid valve is used only for diagnosis, and usually remains opened.
When the vent is closed, under normal purge conditions, the evaporative
emission control system is depressurized and allows EVAP Control System (
Small Leak) diagnosis.
Read more: http://engine-codes.com/p0447.html#ixzz2FLRylDcJ | A***o
发帖数: 351 | 4 any help? How to fix it, thanks. | y********9
发帖数: 1417 | 5 去下个workshop manual吧，里面有step by step的诊断方法，版上不让发链接，自己
搜吧 |
|
