2009 nissan sentra
Usually a quick adjustment of the latch mounting bolts does the trick, or if it is just sticky, WD40 is good stuff. Also, make sure the release cable is retracting.
cable broke release latch for the hood can't open it
Use a screwdriver to release the hood latch through the front grille. Take a look at the hood latch on another car to get an idea of how they work.
There is a special release button known only to the 2004 Nissan Sentra. It is also known as the auto theft convenience mechanism. Newer models had this feature omitted because of problems with auto theft. Pry open your hood and there should be a latch on the driver's side. If not there may be a secondary convenience latch under the passenger's back-seat. Hope that helps.
The flasher unit on a 1992 Nissan Sentra is located under the dash, near the hood release. It sends an intermittent signal to the turn lamps to trigger the familiar flashing.
Under the hood
The hood release lever is below the instrument panel, under the steering wheel, in front of the driver side door on the left. You need to release the hood latch to open the hood. The safety hood latch is in the middle of the hood opening.
The EVAP purge solenoid on a 2001 Nissan Sentra GXE is under the hood. It is mounted to the top of the intake manifold.
If you remove the grill from the front of the truck you can then access the safety latch and hood release. My latch had rusted so I had to do this using a flat head screw driver and lifting the safety latch which allowed for the hood release to open.
Under the hood on the left in the black box
Answer: It took me a while to find it too. Its under the bumper. but as soon as you release that latch you have to lift the hood and release the second latch in the usual place under the hood.