replace rear door shocks. the two rods along the sides.
the struts are probably bad and need to be replaced. you can get them at almost any auto parts stores
Good Chance this is caused by a faulty O2 Sensor. I had the engine light stuck on in my 2002 Montana and replaced rear O2 sensor and it turned it off.
Day time running lights?
Inside your rear door, are 2 "Stay Assemblies" or "Shock Absorbers". One or both have lost the charge of hydraulic fluid. You need to replace your defective stay assembly. They are available at your Honda dealer for about $50 each.
Replace the small looking shocks. That's what holds the door up.
It needs to be Re-Set.. Most places can do it for no cost. takes less than 10 seconds.
you need to change the window regulator
door switch is bad or dirty try spraying with wd40 or replaceing.
If the liftgate will not stay up when you open it, you need to replace the two props ( they look like little shocks ).
The problem is that your door locks / latches are sticking. Spray some WD-40 on all the door jams/locks including the rear door hatch. The problem will stop.
The opening and closing of this relatively heavy rear door is aided by the struts mounted on the left and right side inside the top of the door. These struts are gas filled and assist in opening and closing the door by bearing the weight. If the seals on these start to leak, your door will be very "heavy" to open and will not stay open without additional support. Replacement struts for your vehicle can be purchased at most auto parts stores.
about 18" to the front end of the fuel tank on the inside of the frame. be very careful removing the retaining clips on the fuel lines if you break them the connection will not stay together