警告灯亮了 又自己灭了 是怎么回事？

有件小事：我的一辆2006 马自达6i，警告灯亮半年多了，故障码是P2402（EVAP system leak)，行驶无异常，消除掉马上又亮。网上有说是O2 传感器需要更换，就买了Denso 牌备换。一直犯懒没换。还有说是换EVAP system leak detection pump。现在警告灯自己灭了 不亮了，有点疑惑：自适应了？还是另有所谋？谢网友答疑！

 

网上找到的，看来靠谱

… the CEL comes on posting code P2402 as usual. Other suggestions from the Auto Zone printout include electrical conductivity, bad sensor or bad pump. 
--
In the case of '2402' EVAP system leak detection pump motor circuit high. 
There are 3 suspect parts, electrical shorts (corroded terminals causing high current to ground),
Bad airpump motor assy.
Defective PCM.

 

所有跟帖： 

• 安code，应该是EVAP system leak detection pump -soccer88- ♂ (113 bytes) () 02/01/2016 postreply 12:01:26

• 谢谢老大！最简单的原因是盖子，这个我知道。跑了15万了。 -股聋- ♂ (0 bytes) () 02/01/2016 postreply 12:07:36

• 不客气，一步一步来 -soccer88- ♂ (0 bytes) () 02/01/2016 postreply 15:03:47

• P2404和O2真的有关吗? Highly doubt that. -Oneshotkill- ♂ (0 bytes) () 02/01/2016 postreply 17:54:33

• 可能你说得对 -股聋- ♂ (0 bytes) () 02/02/2016 postreply 06:18:39