Oops! I had similar experience.

My car passed the smogcheck when its check engine light was on in 2006. But there was a mark on my certificate, something like "check eng light on".

A lot of factors can cause the check engine light on. It doesn't have to be related to the emission system. My car had a bad cooling senser at that time. Hope this can help.

所有跟帖： 

• thanks for sharing your own experience I'll have it fixed first -Cielo- ♀ (0 bytes) () 02/06/2009 postreply 15:33:40

• 请问你修cooling senser 花了多少钱?回复：Oops! I had similar experience. -hawaiioption- ♂ (0 bytes) () 02/07/2009 postreply 23:17:46

• I bought sensor from Auto Zone and had my friend changed for me. -sccd- ♂ (0 bytes) () 02/10/2009 postreply 07:57:45