either the cable isnt pulling right to pop the hood or its all cloged with dirt and it wont click it open. I had the same problem. my civic was in an accident and the hood latch bent a bit and it wouldnt close right. then my brother when i bought the car spray painted the grill without taking it off the car like an idiot and quick fix and the paint gunked up my latch. I had to rip my grill out with my hands cause i was getting a new one and pop it open with a screw driver once i saw the latch. left it open, swapped out the latch and grille and ran the cable right and it worked like a charm.