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What is a oil pressure switch - 2004 Dodge Neon

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It is a pressure sensitive switch which lights up a warning lamp on the dash/cluster when the oil pressure is too low,

Posted on Oct 15, 2010

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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

My oil light comes on after higher speeds while idling at a traffic light.


It may be your oil pressure transmitter switch at fault. There's many different oil pressure transmitter switches. Here are some generic images:
oil pressure transmitter switch Google Search
It could also be that your vehicle is due an oil/filter change.
Is your oil level ok?

It's unlikely to be your oil pump at fault.
  1. Check your oil level
  2. Is the vehicle due an oil/filter change?
The oil pressure transmitter switch simply tells the engine 'low oil pressure'. This usually happens at idling speed due to a faulty transmitter switch, low oil level or there's a need for an oil change as the old oil is no longer up to the job. Oil pressure switches are easily changed.

The important thing is that you aren't getting a warning light when driving at speed. If your oil level is okay and it isn't due an oil/filter change - it probably is the oil pressure switch at fault.

For your own peace of mind try adding an oil additive.


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Nov 03, 2015 | Cars & Trucks

1 Answer

How do i change oil pressure sending unit on a 2005 chevy malibu


Hi Viv,here's a link to the oil pressure switch,it is located by the oil filter,it is screwed into the block,to remove, just remove electrical connector,then get a wrench and take off,very easy to do. Oil Pressure Switch at AutoZone com Best Oil Pressure Switch Parts for... HERE'S A VIDEO TO WATCH. FIX OIL LEAK How To Replace Oil Pressure Switch Oil Sender etc POV

Oct 01, 2015 | 2005 Chevrolet Malibu

1 Answer

How to replece oil pressure switch


Thread the new switch into the block by hand and then tighten the switch securely with the the oil pressure switch socket. Connect the electrical wire to the new oil pressure switch. Start the vehicle and check for oil leaks at the oil pressure switch. Verify the operation of the oil pressure gauge.

Jun 16, 2015 | Cars & Trucks

1 Answer

CHANGED MY OIL BECAUSE GAGE WAS READING LOW OIL PRESSURE AND I HAD NO OIL LIFE, TRIED TO RESET OIL LIFE TO 100%, WHICH I DID BUT ON MY DASH ITS STILL READING LOW OIL PRESSURE AND THE GAGE GOES BACK AND...


you either have a faulty oil pressure switch or you have poor oil pressure.if you find the oil pressure switch remove it and install a manuel oil pressure guage there. then you will see if it is the actual oil pressure weak or if it is the switch.

Jan 09, 2011 | 2003 GMC Yukon XL

1 Answer

I need to know where the oli sending unit is and how to replace it?


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Fig. 1: Location of the oil pressure switch-3.3L and 3.8L engines


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Fig. 2: Location of the oil pressure switch-3.0L engine


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Fig.: Oil pressure switch (sending unit) schematic


The low oil pressure warning lamp will illuminate when the ignition switch is turned to the ON position without the engine running. The lamp also illuminates if the engine oil pressure drops below a safe oil pressure level. To test the system, 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 still fails to light, check for a burned out lamp or disconnected socket in the instrument cluster.

REMOVAL & INSTALLATION
On the 2.4L engine, the oil pressure switch is located on the side of the engine block facing the firewall. On the 3.0L engine, the oil pressure switch is located on the oil filter adapter housing, next to the starter motor. On the 3.3L and 3.8L engines, the oil pressure switch is located next to the oil filter.
  1. Locate the oil pressure sending unit on the engine.
  2. Disconnect the negative battery cable.
  3. Disconnect the pressure switch electrical harness.
  4. Using a pressure switch socket, deep-well socket or wrench, loosen and remove the pressure switch from the engine.
To install:
  1. Install the pressure switch into the engine and tighten securely.
  2. Attach the electrical connector to the switch.
  3. Connect the negative battery cable.
  4. Start the engine, allow it to reach operating temperature and check for leaks.
  5. Check for proper oil pressure switch operation.

Hope this helps (remember to rate this answerr).



Dec 22, 2010 | 1999 Plymouth Voyager

1 Answer

How do you change the oil pressure switch on 99 ford explorer? And where is it located in laymens terms.


OIL PRESSURE SWITCH ON LOWER SIDE OF ENGINE NEXT TO THE OIL FILTER.BOTH ARE ON THE SAME OIL CHANNEL IN CYLINDER BLOCK.ALL YOU HAVE DO TO REMOVE IT.IS DISCONNECT OIL PRESSURE SWITCH ELECTRICAL CONNECTOR.THEN USE A OIL PRESSURE SWITCH SOCKET WITH A RARCHET WRENCH AND EXTENSION..YOU CAN BUY SOCKET AT ANY AUTO PART STORES.REMOVE OIL PRESSURE SWITCH. WHEN INSTALLING NEW ONE MAKE SURE THREADS HAS SOME KIND OF SEALER LIKE TEFLON TAPE CAN BE USED ON NEW OIL PRESSURE SWITCH IF IT DONT HAVE NO SEALER ON THREADS. WHEN YOU GET NEW ONE IN PLACE CRANK VECHICLE CHECK FOR LEAKS.

Nov 14, 2010 | 1999 Ford Explorer

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

2 Answers

Oil pressure switch location on 1999 chev cavalier


The oil pressure switch relays the oil pressure in the engine to the instrument cluster. The switch will illuminate the OIL PRESSURE light if the oil pressure drops below 2psi (13 pa). The switch is usually located on the side of the engine, under the intake manifold on the 2.2L engine and on the side of the intake camshaft housing on the 2.3L/2.4L engine.


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Fig. 1: The oil pressure switch is located on the engine block under the intake manifold and is accessible from underneath the vehicle-2.2L engine

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Fig. 2: Oil pressure switch location-2.3L/2.4L engine


Other, the low oil level switch activates the OIL light in the instrument cluster when the oil level in the pan goes below a certain level. The switch is mounted on the oil pan.


Hope this helped (remember rated this post).

Apr 11, 2010 | 1999 Chevrolet Cavalier

1 Answer

I have a Honda 2004 CRV - the repair ( OBD II) code is P2647 - what does that mean?


P2647 VTEC Oil Pressure Switch Circuit High Voltage - With Automatic Transmission Basicallly the sensor has gone bad or an oil passage has become blocked.

**. Locate the Variable Timing Electronic Control (VTEC) pressure switch on the end of the cylinder head. Honda has had problems with the VTEC oil pressure switch, there is an updated part number for the vehicle (37250-PNE-G01). On this vehicle the VTEC oil pressure switch can fail at any RPM.
2. The VTEC oil switch is normally closed, and grounds the reference voltage from the Engine Control Module (ECM) on the Blue/Black (BLU/BLK) wire. If the code sets at idle - 2500 RPM - and the Brown/Yellow wire has a good ground, then suspect a faulty VTEC oil pressure switch.
3. At approximately 2500-4000 RPM and when driving the vehicle, the VTEC system should turn on. To turn on the system, the ECM energizes the VTEC Solenoid valve and it allows oil pressure into the intake valve rocker arms, the oil pressure opens the VTEC oil pressure switch so the Engine Control Module (ECM) can verify that the VTEC did turn on correctly.
4. The code will set at idle to 2500 RPM if the reference voltage is not grounded. The code will set above 2500-4000 RPM if the VTEC oil switch does not open.
5. If the code sets at 2500-4000 RPM or higher, the problem can be a low oil level or pressure, or a malfunction in the VTEC assembly.
Potential Causes: Low Engine Oil
Plugged Oil Passage
Insufficient Oil Pressure
Plugged Oil Screen
Insufficient Oil Volume
Malfunctioning VTEC Oil Pressure Switch
Defective VTEC Solenoid

Jul 13, 2009 | 2004 Honda CR-V

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