Are senses fail a christian band?

No, definitely not. The name of the band is actually influenced by Buddhism. They might have songs or lines influenced by religion or the idea of god, but they are not a christian band. I can't actually even think of any songs of theirs about Christianity for that matter. If anything I would say they were agnostic.

this was taken from wikipedia:

"The band took their musical influences of punk and hardcore and mixed them with poetry, emotion, literature, religion, eastern philosophy and spirituality to create their own sound and image The name "Senses Fail" is derived from the Buddhist belief in Nirvana. Lead singer Nielsen explains, "In Buddhism, they believe that being alive is hell, and the only way to reach Nirvana is to ultimately have no attachments to anything. So, people go out and live in the middle of the woods and they don't eat and don't drink. They just meditate because they've reached such a high level where they're not attached to love, relationships or anything. And if you want to reach the highest level of being and see God, you have to have all your senses fail.""