Honda civic 2003 check engine light on Code p1456

My 2003 civic check engine light is on today. I took it to autozone for a check. It gave me a code of P1456 - it is about the emission system.

I searched on the internet. There are quite a few people who have the same issue. From what people posted, P1456 seems to relate to some kind of gas tank leaking. For someone, it is just loose gas cap, but there could be other reasons.

I made sure my gas cap is tightened. The light is still on. Does anybody here know what could be wrong?

Thanks!

所有跟帖： 

• 如果你加油后， 没盖紧， 有可能。 -桥盲- ♂ (39 bytes) () 08/24/2010 postreply 08:34:51

• 有些手册说可能要开掉1-2箱油才灭灯.心急的可以断电 -满地找牙- ♂ (0 bytes) () 08/24/2010 postreply 09:40:06

• 说是这么说， 实际上要快得多 -桥盲- ♂ (77 bytes) () 08/24/2010 postreply 10:00:48

• 慢的就要跑完一整箱油,我朋友碰到过 -满地找牙- ♂ (0 bytes) () 08/24/2010 postreply 10:14:19

• 加油盖没盖紧，有可能黄灯。要断开电池线，再接通。 -事后诸葛- ♂ (448 bytes) () 08/24/2010 postreply 09:55:33