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While driving on the highway the check engine light came on. I did a systems check and it said low oil pressure.

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So is this a failure of the oil pressure switch or there is low oil pressure in total. If so have you changed the oil filter and oil in recent times or is this Due? if so change and test once again.
If the fault stays then the oil pump within the engine is faulty which means the engine needs to be remove and checked. Please take opinions before an action is taken.

Posted on Mar 23, 2011

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Did your oil light come on as well?? Sounds like your oil pump is going bad just from what you told me.....Check your oil and make sure you have it full...
Dont run your engine with low oil pressure as it could seize especially if your oil pump isnt working.

Posted on Mar 23, 2011

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Posted on Jan 02, 2017

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SOURCE: Oil light flickering and knocking noise on 04 Mazda 6

oil pressure senor would be my first guess.if that checks out possible oil pick up blocked
or worst case worn crank bearings but i doubt it at the age of the car
fuel pressure side of it, could be possible fuel pump

Posted on Apr 09, 2013

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1 Answer

While going down highway (at) 70 mph, why did car just turn off?


Low oil would not show up on the engine computer, but low oil pressure would. If the oil light did not come on before the engine stopped, its possible you toasted the engine.

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High temp low oil pressure light comes on after driving for a few minutes, then off when engine at driving rpm. At stop light (idle or low rpm) light comes back on. Normal driving it goes out.


You need to find out why you have low oil pressure. It is normal that as engine rpm's increase, the oil pressure will rise- the oil pump is moving oil faster. Even though your light goes out, you could still have critically low oil pressure. There should be sufficient pressure at idle to keep the light off. The light will come on when your oil pressure is almost nil- I believe for some it's as low as 8 psi. Normally, oil pressure at idle is specified anywhere from 15 to 40 psi. You would have to check specifications for your Expedition. To verify oil pressure, hook up a mechanical gauge at the oil pressure sending unit on the engine block. Check with a local shop.

The causes run from easy, simple to budget busting ruin. Low oil level, wrong grade oil, real old oil, oil leaks, internal oil leaks, worn oil pump, worn crankshaft bearings. It was pretty common on older very high mileage cars to have a fluttering oil light at stops and idle. It was time for a rebuild, or time to look for another car.

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Oil light comes on and is dinging.


The oil light has nothing to do will oil level, but rather oil PRESSURE. If the engine oil is full and there is no rattling or banging noises in the engine, chances are the oil pressure sending unit is bad. If noises accompany the light, then shut down the engine and troubleshooting the engines internal lubrication system.

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Check engine light with oil light came on


The oil light means the engine oil pressure is below 10psi.
Could be a faulty switch, or it could actually be low oil pressure.
I would not drive at at highway speeds until you get it checked out.
Most auto parts stores will scan the computer for trouble codes for free in hopes of selling you some parts. The code or codes will point you in the direction of the problem with the check engine light.

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Engine light came on


You should never drive with a red engine light there is always the risk of further damage to engine,this could mean no or low oil pressure driving like that will damage the engine. Check oil level first check coolant level and get back to me.

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Oil light comes on when travelling at highway speeds after cooling down it shuts off


Stop driving it until you have this checked out!
Low oil pressure is making the light come on.
The engine might seize up on you and that's big bucks.
Or course having the oil light come on may be big bucks as well. It means the bearings might be worn out and you'll either need to overhaul the engine or get a replacement engine - or new car!

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1994 mercury Topaz oil light is on and i do not need oil


Low Engine Oil Pressure

The oil light is signaling low oil pressure in the engine's lubrication system. You say that you have checked the oil level in the engine and it is ok.

The oil pressure needs to be checked with an oil pressure gauge. (It is most unlikely that the warning light is faulty).

Should the oil pressure prove to be low - as I expect it will - the cause needs to be investigated. It is likely that there is a malfunctioning or failed oil pump or the oil pressure relief valve is sticking in the fully open position.

Failure to change the engine oil, at least at intervals stated by the manufacturer, will result in severe oil degradation and reduced oil pressure. However this is usually not enough to trigger an oil pressure warning light.
If you have changed the engine oil in the last six months or so, and have not done over about 7000 miles since then, oil degradation should not be contributing to the low pressure problem.

If the oil pressure gauge check confirms low oil pressure I suspect, on further investigation, that you will find a problem with the engine's oil pump.

You will need to get your vehicle to a reputable auto service shop to have the oil pressure checked and the problem investigated. Do not drive the car in this condition (except to get it to the repairer). The engine is not receiving sufficient lubrication and you run the risk of expensive engine damage and total engine failure.

Hope all goes well with it. Cheers.

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2 Answers

Dodge caravan '98, oil light on, plenty of oil


If the engine is not making any knocking type noises, check the oil pressure sending unit. If it is leaking oil then it needs to be replaced along with removing the rubber plug from the connector and cleaning the terminals. If the oil light still comes on then the oil pressure is definately low and could cause engine failure.

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Transmission Component Slipping (TCC Stuck off)


code p 1870 refers to transmission component slipping
That can be from dirty oil or a clutch pack or band slipping or low oil pump pressure in the transmission
you say that it occurs on highway driving after 2 hours and that slipping will add friction heat to the transmission oil bringing on the oil temp light
take it to an accredited transmission professional service center that works on your make of vehicle , have the oil changed which require the pan removal
at the same time that will allow the adjustments to be done
when reassembled and refilled , have a pump pressure test done

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