Question about Ford Expedition

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Engine off low oil pressure. Won't start

My 2006 ford expedition won't start. The system check indicated that the ENGINE IS OFF LOW OIL PRESSURE. I CHECKED THE OIL AND IT WAS NORMAL. WHAT COULD IT POSSIBLY BE?

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  • 117 Answers

Sending unit replace oil pressure sending unit first

Posted on Mar 05, 2015

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Posted on Jan 02, 2017

czaa
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SOURCE: 2007 Ford expedition won't start

ur oil pump may be failin-there r sensors everywhere on new cars-keepin u from starting as safety measure-computer systems r complex n things dont always show on 1 scan-they kinda hav the mindset of a pc

Posted on Sep 15, 2009

Testimonial: "Thank you. I have spoken with 2 other mechanics who said the same thing regarding the oil pump. It's being looked at. So I'll post more once I know"

duane_wong
  • 6826 Answers

SOURCE: How do I check and possibly replace the engine oil

Oil Pressure Test Check for proper oil pressure at the sending unit passage with an externally mounted mechanical oil pressure gauge. A tachometer may also be needed, as some specifications may require running the engine at a specific RPM.

  1. While the engine is cold, locate and remove the oil pressure sending unit.
  2. Following the manufacturer's instructions, connect a mechanical oil pressure gauge and, if necessary, a tachometer to the engine.
  3. Start the engine and allow it to idle.
  4. Note and record the oil pressure reading when the engine is cold. The engine may need to run at a specified RPM, if so check the vehicle's specification.
  5. Run the engine until normal operating temperature is reached.
  6. Check the oil pressure reading again with the engine hot and record the value. Turn off the engine.
Compare the hot oil pressure reading to the specification. If the reading is low, check the cold pressure reading against the specification. If the cold pressure is well above the specification, and the hot reading was lower than the specification, the engine may have the wrong viscosity oil. Change the oil, making sure to use the proper grade and quantity, and then repeat the test.
Low oil pressure readings could be attributed to internal component wear, pump related problems, a low oil level, or oil viscosity that is too low. High oil pressure readings could be caused by an overfilled crankcase, too high of an oil viscosity or a faulty pressure relief valve.

Posted on Oct 09, 2010

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2004 expedition wants to turn over but wont. Oil pressure low light comes on. Oil level is fine.


The low oil pressure light will come till the vehicle starts an runs ! Explain wants to turn over but won't ? The engine spins over when you turn the key to the start position but won't start an run ? Or when you turn the key to the start position an nothing happens ? If the first one engine spins over but won't start an run , What's missing ? Spark , Fuel pressure , Compression ? Videos on youtube for cranks no start , how to trouble shoot !

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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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The oil light does not indicate the car is low on oil (based on your discription) it indicates the oil pressure is low, the no start is most likely due to this low pressure and the fuel pump has been cut off to prevent damage to the engine from low oil pressure. Please have a shop locate the cause of the low oil pressure warning and repair it as needed. It could be a false light or a real one, which means if you drove it very far you may have damaged the engines bearings.

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I think what was meant is the oil pressure sensor which is a pressure switch and indicates the pressure when the engine runs. This is very much critical as a low pressure will show up as an error- check engine /oil- and can shut off the ECM.
So if the pressure sensor is bad it will indicate or if the oil pressure is low it will be sensed to indicate for action.-- check oil ,oil filter or oil pump.

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1995 Ford Econoline 150 with 302 engine. Oil pressure indicator starting dropping when idle speed went down, Had a new oil pump and sending unit replaced, still does the same thing. Has 190K on it, now as...


When you had the pump replaced did anyone look at the rod and main bearings? 99% of all low oil pressure problems I've seen has been directly related to bearing wear, not a bad oil pump.
Replacing the pump will give you slightly better pressure temporarily but that won't last very long.
Verify the actual oil pressure using an external mechanical gauge. If it's low (likely it is) go back into the oil pan and use plasti-gage on the bearings to measure clearances.
In reality though, in an engine with that many miles, it's best to either completely rebuild or replace it though.

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My 2006 expedition will not start. the information center says ENGINE:OFF LOW OIL PREESURE....but my oil level is full and clean


If the engine is not running, the low oil pressure indication is correct and normal. There will be no pressure until the engine is actually truning over/running.

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What does a low oil pressure alarm mean


It means the sensor that detects your oil pressure has seen a situation where the oil pressure is too low and engine damage will result. Could be just a bad sensor, but better have it checked with a mechanical gauge to see exactly what the pressure is.

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2007 Ford expedition won't start


ur oil pump may be failin-there r sensors everywhere on new cars-keepin u from starting as safety measure-computer systems r complex n things dont always show on 1 scan-they kinda hav the mindset of a pc

Sep 15, 2009 | 2007 Ford Expedition Eddie Bauer EL

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