I have a 2002 Mitsubhishi Lancer. I changed the oil a week ago. The oil light is now flickering while driving. I checked the oil via the dipstick and it remains full. How can I verify if it is the oil pressure switch, and if it is the switch, where is it?
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There may be a misunderstanding here. Yes the warning light comes on when the oil pressure drops below 5psi. If the light comes on and the switch is working correctly, the oil pressure is not good. Any problem with the pump or the screen would make the pressure not good. If the oil pressure has been checked with a mechanical gauge and it is above 20psi, the switch or the wiring could be faulty. You would need to have the pressure checked to know.
Replace the oil pressure sender. The sender is what is turning the warning light on.If you replace the oil pressure sender it should fix the flickering light problem. If it does not , the light is an indication of more serious motor killing problem. Fortunately, the sender is under $10 and usually fails before the actual oil pump.
a loose connection WILL NOT cause flickering oil light unless your your oil is empty at the same time a connector is loose. This flickering is most likely caused by clogged oil ports or failing oil pump. When this happens there is insufficient oil running through the engine, causing the sensor to activate the light intermittedly. Have this checked immediately to prevent extensive engine damage. Hopefully this helps!!
That sounds like you bought big problems. Oil ights indicate low oil pressure= BIG BUCKS. I would have a qualified repair shop check it out, A shop that specializes in BMW. If you are lucky, maybe the oil sender is just bad. They can also check out the Ck eng light. But the oil light is priority one.
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
I had the same exact problem over the weekend. We decided to go cheap first and replace the Oil Pressure Switch. It's like $6.00 at Auto Zone here in Texas. (don't know if you are from the states). It ended up being the switch. It's located right by the oil filter and it's very easy to change. Just make sure you have a wrench or deep socket bigger than 15/16. I think we used a 1 inch wrench.
If it's not the switch, its most likely the oil pump, but don't forget to check the hose, it could be bent or crimped.