Engine oil light flickers despite new sender and car battery
The oil pressure light came on and as result the "sender" was replaced along with the battery. Things seemed fine until 3 weeks later: the light reappeared, only when I've been driving for 10 minutes or longer and only when I'm at a complete stop.
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Re: Engine oil light flickers despite new sender and car...
HI, i would double check that sending unit for lose or bad connections. make sure the wires are in good condition. if everything checks out ok with the new sender, it could be that the oil pump is malfunctioning or, the oil pump screen is dirty or clogged.
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disregard auto advice as there is no connection
oil pressure sensor switches are located in the oil galley along the block or next to the oil filter housing
normally only one wire
I suspect that the wire to the switch is loose and not making proper contact
The fix here is to eliminate any mechanical problems ( pump and filter blockage ) by having an accredited service center remove the sender unit and fit a mechanical oil gauge to see what is happening with the pressure
If it reads within the specified limits, replace the sender unit or check the wire for loose , broken or shorting out
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.
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.
I think you have a suspect oil pressure sender unit. Replace it as they are cheap and need to be reliable and it will be cheaper than getting the oil pressure tested. If the light still stays on with the new sender you may have internal wear or a partial blockage. If the light stays on you need to have it urgently checked by a mechanic or you could risk serious engine damage.
cheapest thing to do is replace oil pressure sender ,unless you have an oil pressure gauge to test actual pressure,sender should be near oil filter housing could be 1 to 3 wire connector,you'll need special socket to r&r part,also make sure car idles normal when hot, if surging or low you may get light flicker in drive.
The good news: a ford dealer can make you a new key. The bad news, that oil light coming on when the engine is warm, is an indication that you have low oil pressure when the oil gets hot and thin. This is usually an indication that the rod and /or main bearings are about to fail. This pretty much means you need a new (or used) engine. There is an off chance that the oil pressure sender has gone out of calibration and is turning on the light prematurely, but this is rare. The correct way to check this, would be to hook up an oil pressure gauge and let the engine get hot, then compare the readings against specs. Your shop should have done this. Failing that, you could gamble the price of an oil pressure sender and see if the light stays off. If not, put heavier oil in and drive it till she dies because repairing the problem is probably more expensive than a good used engine.