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Will too much oil cause a check oil light to stay on ?

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No. A bad sensor will. A bad pump or bad crank bearings will also. Way to much oil is not a good thing either.

Posted on Dec 15, 2016

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Where is the oil sending unit on a 1996 mercury cougar xr7 ? Its cause my oil pressure gauge is bouncing up and down...i dont know why...can anybody please help me thank you so much


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The low oil pressure warning lamp will illuminate anytime the ignition switch is turned to the ON position without the engine running. When the engine is running, the light also illuminates if the engine oil pressure drops below a safe oil pressure level. To test the system, perform the following:
If the oil pressure light does not work, perform the following:
  1. Turn the ignition switch to the ON position.
  2. If the lamp does not light, check for a broken or disconnected wire around the engine and oil pressure sending unit switch.
  3. If the wire at the connector checks out OK, pull the connector loose from the switch and, with a jumper wire, ground the connector to the engine.
  4. With the ignition switch turned to the ON position, check the warning lamp. If the lamp lights, make sure the oil pressure switch is properly grounded in the cylinder block, and if so replace the oil pressure switch. If the lamp still fails to light, check for a burned out lamp or disconnected socket in the instrument cluster.
To diagnose an oil pressure light that stays on, perform the following:
  1. Check the engine oil level and top off as necessary. If the engine was 2 or more quarts low on oil, test start the engine after topping off the oil level and recheck the oil pressure light operation. If the light stays on, stop the engine immediately and go to the next step.
  2. Disconnect the wire at the sending unit, then turn the ignition switch to theON position. If the light remains on, check the wire from the sending unit to the gauge for being shorted to ground and repair as necessary. If the light goes out, turn the ignition switch OFF and go to the next step.
  3. Replace the oil pressure sending switch with a known good switch.
  4. Start the engine and check the oil pressure light operation. If the light stays on with the engine running, stop the engine immediately to avoid severe engine damage until the cause of the problem can be determined.

WARNING
If the oil pressure light remains on while the engine is started, stop the engine immediately. Do not operate the engine until the cause of the problem can be determined. Operating an engine with low oil pressure will cause severe internal damage.

Possible causes for an oil pressure light to stay on are:


Pinched or grounded sensor wireDefective oil pressure sending unitRestricted or severely leaking oil filterExcessive internal engine bearing clearance.Insufficient or severely contaminated engine oilBlocked oil pump pickup screen or severely worn oil pump

Mar 31, 2016 | Mercury Cars & Trucks

1 Answer

Why would the oil light stay on?


That depends on the type of oil warning light being displayed. There are 2 types of warning lights

1. Low oil pressure light which all cars have
2. low oil level light which some cars have.

Low OIL PRESSURE warning means the oil pressure is below minimum and when this happens there will be insufficient lubrication of many engine parts because sufficient oil cannot get to all parts of the engine it is required to lubricate. Until the cause is identified and rectified the warning light will remain. If you run your engine with low oil pressure you will cause expensive damage to internal engine components.

Low OIL LEVEL warning means the oil in the sump has dropped to a dangerously low level (which may be due to an oil leak or abnormal oil consumption by the engine.) This warning means the oil level needs to be topped up and the warning will stay displayed until you top up the oil. Running the engine with low oil will cause expensive engine damage.
Since it is a 2 minute job, Oil levels should be checked fortnightly as a minimum, together with radiator coolant and power steering fluid levels, if you run the car most days each week as most people do.

It is possible for a warning light to remain displayed when the cause has been dealt with because there is a problem with the sender unit. However it needs to be established with alternative checks that the problem has been fixed before investigating if there is a problem with the warning light itself.

Nov 21, 2015 | Cars & Trucks

1 Answer

1988 toyota 4x4 pickup check oil light is staying on. checked oil level and was full.why does the light stay on


It means your oil pressure is too low to safely run engine. Causes might be a worn oil pump, a failed oil pump gasket, clogged oil passages from sludge, or badly worn crankshaft bearings.
If your toyota is not burning oil, or very little, I would take a look at the oil pump on your engine. After removal, they can be checked (and repaired) with a feeler gauge for proper working condition, but most people just replace with new.
If you want to be certain about the pressure reading, you can check pressure with a mechanic's oil pressure gauge. You have to run the engine just long enough to get a good reading on the pressure gauge, a moment or two.

Nov 30, 2011 | Cars & Trucks

1 Answer

What would cause my oil light to stay on? I checked oil and it is full and the oil light just stays on.


pull the ribber cover back if fitted over the oil light switch as if this is full of oil then it will hold the light on ,but if no cover and wiring not chaffed through then i would suspect the engine is worn out and will require re-conditioning or as its 22yrs old just buy a nice newer secondhand vehicle from a family whos had a bereavement and their clearing out the house .

Mar 06, 2011 | 1990 Toyota Corolla

3 Answers

Oil light on when oil is full


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!!

Mar 20, 2010 | 1998 Toyota Camry

2 Answers

1984 New Yorker 2.2 Turbo oil pressure low on ilde


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.

Sep 05, 2009 | 1984 Chrysler New Yorker

3 Answers

Exhaust leak and oil loss


the valve seals leaking oil inside the cylinder will cause an internal oil leak you can't see. exhaust leak is something different. best of luck.

Aug 06, 2009 | 2005 Kia Rio

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