Question about 1999 BMW 318 ti

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Oil light comes on at very low rpm - 1999 BMW 318 ti

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Ronnie Wilson

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It IS NOT Advisable to Drive this Vehicle Untill This Problem is AT LEIST DIAGNOSED, You Need A MANUAL OIL Pressure TEST, to Determine If OIL PRUSSURE is SAFE @ >>Oil Pressure at idle speed with engine at operating temp.min. bar 0.5 Regulated Pressure bar 4.3
If it Is ok First On List Is Oil Pressure Sensor But if it's Low> Replace
Oil PUMP
Obviously Inspect Wires To Sensor / Sensors Before High Dollar Parts Are Resorted to.

Posted on Aug 04, 2009

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Mark Babineau

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If the rpm goes below 550 - 600 the maf sensor may be dirty or bad, change the spark plugs this may bring you idle speed up. if the rpm is very low the oil pump does not have the corect minimum rpm to produce enough oil pressure to satisfy the oil pressure sensor.

Posted on Aug 04, 2009

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5 Related Answers

Anonymous

  • 1 Answer

SOURCE: oil pressure light at low RPM

Before you have major repair done on your car because of the "oil pressure light", review the list and see if any of these might be the source.  Some of the things on this list are things you can do yourself, some only done by a mechanic (inexpensively), and others require the aid of a mechanic.
1.  Check to see if you have a leak.  Low oil levels can make the oil sensor light come one.  Check your oil level following the manufacturers recommended procedure or use the information listed here http://autorepair.about.com/od/regularmaintenance/a/checkoil.htm.  If you do not have a low oil level, but still suspect a leak, place a drip pan under the oil plug overnight.  If you have a leak, you'll see signs of it there.  Then take the vehicle to a trustworthy mechanic and let them trace the leak.  It is possible for your engine to only leak when it is hot, so make sure you get the engine nice and warm before you put the car away for the evening and place the drip pan under your vehicle.  Other signs of an oil leak are listed below as well as an "oily" exhaust that leaves it mark on your bumper or "blue smoke" as you drive/idle.
2.  Check the coolant levels. If the coolant is low, the oil will heat up faster and cause a viscosity breakdown.  When the oil viscosity is low (= thin oil), the oil sensor light can come on.  If the coolant is low, add more.  Keep in mind that an engine running hot will heat the engine oil to the point that it thins out and burns off in the cylinders.  If the coolant level is fine, have the coolant (water) pump checked.  If the coolant is not circulating well through the engine, you'll probably have coolant boiling over, too.
3.  If you can afford to do it, change your oil to a higher or lower viscosity.  Refer to your maintenance manual and your trusted mechanic. I say this because, if your oil is thinning out too much because the viscosity is too low, your "check oil" light will come on.  If your engine oil is too thick, you engine will need added internal pressure to get it to circulate.  At lower RPM (just like thin oil), your engine oil light will come one.
4.  Have the oil pressure checked by other than an electronic means.  Your trusted mechanic can place an oil gage between your oil filter and the rest of the engine or on the oil fill cap of the engine.  If you are having an oil pressure problem that is seal-related, that should narrow it down.  If you can't afford to do that, when you get your next oil change, replace: the oil fill cap, PCV valve, and air filter.  All these contribute to the measurement of engine oil pressure by that picky little oil pressure sensor.
5.  Have the oil pressure sensor checked.  You may need some weird add-on to make it behave.  Do a search for the following part and read and you should have a better understanding: "part # 05017800AA a terminal/wire/vent to the oil pressure switch connector".  Never forget that sensor are usually engineered to report a problem well before a catastrophic failure can occur.
6.  If you're driving a high-milege car, make sure you are up to date on all of the engine-specific services.  For some vehicles, it is recommended that the head gaskets are replaced.  If you have internal engine leaks because of it, this will solve most of those issues.  Signs of this include: coolant visible in the crankshaft area (you can see this with the oil cap off), oil fouling your coolant (you can see this in the coolant reservoir), or smokey exhaust.  Expect your trusted mechanic to recommend that you change your spark plugs, timing belt, and cam shaft gasket at the same time.
7.  See if the oil pump needs to be replaced.  A faulty oil pump can contribute to low oil pressure as it fails (but hasn't failed, yet).  
8.  Do all of the above BEFORE you take to recommendation to have your engine replaced.
I have a 1998 Chrysler Cirrus (I know it's not a minivan, but hear me out).  I've been the single owner and have learned more about how engineering oversights or over-cautiousness can send you to the mechanic for just about everything.
Hope this helps!

Posted on Jan 20, 2009

Anonymous

  • 87 Answers

SOURCE: low oil pressue light at low rpm

wrong oil need 10w 40 weight caster oil is best. See right now you have thin oil and in hot weather and hot motor temp . It just gets thiner . now with 10w 40 you will bring it up a bit thus lowering the oil presser and bringing it to a happy medium .

Posted on Jul 12, 2008

Patrick Rayome

  • 1757 Answers

SOURCE: 98 Dodge Caravan Oil Light/Alarm comes on

Remove, check and replace the Oil Pressure Sensor. It should be located adjacent (just left of) the oil filter.

Posted on Jan 03, 2010

Anonymous

  • 153 Answers

SOURCE: 2001 f150 super crew oil light comes on at low rpm

you must obtain an oil pressure gage you can use a inexpensive type like you would hang under your dash. remove the oil pressure sending unit from the engine, a little oil will leak out when you remove it, no big deal. install the add on gauge and see if the pressure at idle with the engine warmed up is over 20 lbs. if not you probably have bad crankshaft bearing but you would want to see what htings look like inside the oil pan.if the pressure goes up to about 60lbs when running fast. and is very low at idle the engine is probably worn out. if the oil pressure drops when it is running fast you may have a plugged oil screen.i have found paper towels and rags inside of engines.

Posted on Feb 21, 2010

mike looccm

  • 117 Answers

SOURCE: oil light comes on when braking or low rpm.goes

Stop driving the vehicle and have oil pressure tested as soon as possible. This is the most important sensor for the engine's reliablity. Good possiblity that the oil pump is going out and will need to be replaced.
If oil pressure is good replace oil sending unit

please vote if this helps

Posted on Aug 21, 2010

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2 Answers

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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you have low oil pressure when the oil warms up cam barring or crank shaft barring main barring you can try a thicker oil like 15/40

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My rpm drops to 500 when in idle mode after its warmed up and then oil light comes on


500 rpm when not in gear seems a bit low but not ridiculous. Oil light comes on when oil pressure is too low. Is your oil very old, do you fail to change it ever. Or your idle speed just isn't high enough to maintain pressure. You may need a new oil pump.

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I have a 01 Mazda Tribute,At low RPM my oil light comes on, I added honey and the light didnt come on for a day. Now its coming on. What should my next step be? Oil Pump? Sensor? Or oil change wth thi


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If it is low oil pressure, you may need another engine.

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idle is too low?
look at the tachometer. What RPM is it? 800 ok, 300 bad.
the silly switch comes on at 3 to 5psi, (bad bad horror that)
if the light comes on, the oil pressure is horribly low.
running 5w oil?
low rpm, or wrong oil., or bad news.

if rpm too low, fix that first.
all cars.

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1 Answer

Knocking knoise under 1500 rpm


If your car has hydraulic tappets and low low oil pressure at engine speeds then it can make tapping noises. Oil pressure is needed to maintaine the tappets clearances, excessive cleaeances will produce noises.

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Sounds more like the Throttle Position Sensor or another sensor is letting the engine RPM's drop too low. When the RPM's are too low, the oil pump is not pumping enough oil.

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1 Answer

Low oil pressue light at low rpm


wrong oil need 10w 40 weight caster oil is best. See right now you have thin oil and in hot weather and hot motor temp . It just gets thiner . now with 10w 40 you will bring it up a bit thus lowering the oil presser and bringing it to a happy medium .

Jul 12, 2008 | 1999 Audi A4

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