Question about 1989 Peugeot 405

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Can you tell me where the oil pressure switch is on a 405 and how to test it as the light does not come on on the dash when i switch the ignition on. Thanks

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Its on the front of the engine block next to the oil fillter.most probs its the bulb in the clocks.

Posted on Aug 01, 2009

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Petrol or diesel model ,if its the diesel its under the engine at the back just behind the pulley where the oil filter is


Posted on Jul 25, 2009

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1 Answer

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

2 Answers

How to reset oil light on dash of 01 1.4 golf


Oil lights do not reset.

Your Golf either has low oil level/pressure or the oil pressure sending unit/wiring is bad.

You need to immediately check your engine oil level. The instructions are in your manual.

If the oil level is low, DO NOT DRIVE THE CAR! YOU WILL DAMAGE THE ENGINE! Add oil as instructed in your manual and the light should go out within 20 seconds or so after you start your car. You will then need to check for leaks and/or find out why your oil was gone.

If the oil level is normal, you need to get the car to a mechanic to see if the problem is the sending unit or an actual oil pressure problem. Since at this point you cannot be certain, I recommend that you have the car towed to avoid engine damage that will happen if your oil pressure is indeed low.

Feb 10, 2011 | Volkswagen Golf Cars & Trucks

5 Answers

Whats the purpose of an oil pressure switch can it determine weather oil leaks from your grand prix or not?


The oil pressure switch or sending unit is a unit that receives an electrical signal showing what your cars oil pressure is.And yes it does partially does let you know when there is a problem somewhere in the oil system.For example if your filter gets clogged up your oil pressure will go down and then go up when you accelerate.If there was a leak in the system first you would probably see the leak And if the oil pump or oil pump shaft were to break you would have no oil pressure.So you can see the importance of having an oil pressure switch.I feel there are 2 guages that are important to watch are your oil guage and water temp guage they can tell you allot about how your car is operating.

Feb 09, 2011 | 1997 Pontiac Grand Prix

3 Answers

Where is the oil pressure switch located on the engine of a 2007 EOS turbo 2 liter?


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Jan 10, 2011 | 2008 Volkswagen Eos

1 Answer

The oil pressure light on my car does not light up when i switch on the ignition. I was wondering if you could tell me where the oil pressure sensor is in the engine, so i can test it and see if it is the...


look on the cylinder block ,oil light switch is in line with a oil gallery mbut some models its on the filter housing head but you havent stated what model

Dec 31, 2010 | Peugeot Liberte Cars & Trucks

2 Answers

My needle on my oil pressure gauge just died & went all the way facing down.


sounds like the wire came off the oil pressure sending unit.

Nov 06, 2010 | 2003 GMC Envoy

1 Answer

Peugeot 406 - orange car shape come up on dash board as a warning light just above oil pressure gauge. What does it mean please ?


check engine light..an auto parts store have hand held scanners and can tell you the problem for free... Hope this helps tim

Aug 29, 2010 | 2005 Peugeot 405

2 Answers

Oil light flickers when in idle. Oil on dip stick measures fine.


install a mechanical guage to test the actual pressure, if its fine the sending unit is faulty, if nor remove the oil pan and check the oil pickup for blockage,

May 24, 2010 | 1999 Chrysler Concorde

1 Answer

Getting a "Low Oil Pressure" message on the dash board.."Turn off engine" any ideas of what the problem might be?


Hi. This issue has several causes, but the oil light indicator is a strong sign of low pressure in the engine. This will cause the engine lubrication rate to drop, thus, producing a illuminated oil light, and erratic Oil pressure readings. The necessary actions are to have a manual oil pressure test ran on this engine, asap. When running a manual oil pressure test, you will discover if the true oil pressure is low, or normal. If the test proves that the oil pressure is, indeed, low, this will confirm that the Oil pump is suspect.

Now, if the true readings given during the manual oil pressure test are indicating that the pressure is normal, this will be the result of a failed sending unit(oil pressure switch).

Jan 11, 2010 | 2003 Chevrolet TrailBlazer

2 Answers

Oil light


If the oil light is on it's one of 2 things: You have no oil pressure, or the sending unit (also known as the oil pressure switch) is defective and is reading no pressure when there actually is normal pressure. You should always assume it means no pressure, because driving it this way will ruin the engine.

Mar 19, 2009 | 2000 Chevrolet Venture

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