One of two things may be happening. If the oil light stays off until the engine warms up and then begins to flicker on/off when you are idling & in gear [say at a stop sign] then you could actually have low oil pressure due to worn internal engine parts, OR, you could have a faulty sending unit that is reading the pressure incorrectly [usually low] and turning on the light. The best way to find out for sure is to have someone remove the sender and thread in an oil pressure test gauge to check and see exactly how much oil pressure you really have when the engine is first started and fully warmed up. You could just simply replace the sender and if the flickering is gone after that then you should be ok but if the flickering continues then odds are you actually do have low oil pressure. I would strongly recommend having the oil pressure tested for peace of mind then you'll know for certain what is happening. Engine bearings don't survive very long without sufficient oil pressure so you should have it checked out asap.
SOURCE: Just had oil changed, dipstick reads full, but oil light flickers
the light is probably sending an OIL Pressure drop warning ---there is a rarity however
an oil filter may be improperly installed or the OIL Pressure connection on the oil pressure
sending unit --usually next to the filter --is loose or corroded or the oil pressure sending unit may
be going bad ---on a 2001 it is conceivable
otherwise you have an internal oil pressure leak --crank or cam bearings --bad o ringy thingy somewhere or the oil pump --may be experiencing problem too or the pick up screen in the oil pan
is somwhat clogged ---for a clog --try what's called SEAFOAM in the oil ---the stuff actually works
like it says on the can --about 8 bucks --drive for a week --say 500 miles worth and change the oil filter again --just the filter ---either way OIL Pressure is nothing to ignore ---you need to fix that
asap depending on the problem source!!!
I hope this helps
HAWK
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