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The oil pressure gauge was working yesterday. It's not leaking oil or burning it. The gauge isn't working now. Could i be low on oil or is something else wrong?

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  • Cars & Trucks Master
  • 5,316 Answers

Good idea to check oil level first. Next, check that wire to oil pressure sender is still attached. Next, try hooking up know good mechnical gauge to insure you really have pressure. If all good, short wire to sender to ground--if gauge come up, replace sender.

Posted on Apr 14, 2015


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Posted on Jan 02, 2017

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SOURCE: Oil Pressure going up and down during acceleration and decel.

Hi, this is a faulty oil pump and , it should be replaced asap. make sure the mechanic replaces the oil screen as well.

You can test the pressure gauge and True oil pressure by using the guide below.

Testing the Oil Pressure Gauge

* Test the gauge by grounding the wire that leads to the sending unit on the block.
* When the wire is grounded with the key switch on, the gauge should show maximum oil pressure, or the light should go on.
* If either happens, the gauge and wiring are good and the sending unit is at fault.

Testing Oil Pressure

Pressure can be tested by temporarily installing an oil pressure gauge in place of the sending unit. Before testing, look up the oil pressure specifications for your vehicle in the appropriate service manual.

* Bring the engine up to operating temperature.
* Now shut the engine off.
* Locate the oil pressure sending unit; usually it is on the lower side of the engine block.
* disconnect the wire from the sending unit and use an Open Ended Wrench to remove the sender. using pliers can damage the unit.

* Tighten the oil pressure test gauge into the hole in the block where the sender was removed.

* Check the engine's oil level and fill, if required.

Be extremely careful when working near a running engine. Always wear safety goggles or glasses with side shields when working around moving machinery and be sure that your clothing is not loose.

* Now turn the engine on and check the oil pressure on the gauge.
o Watch as the engine warms to note any excessive drops due to temperature.
o Make sure the engine speed is set to specifications for testing pressure.
o if necessary, us a Tachometer and adjust the engine idle speed.
* Record the measured oil pressure, then turn off the engine.
* Compare the test results with the manufacturer's specifications.
o If the oil pressure is within specifications, this shows that the oil pressure sending unit may not be working correctly.
o In many cases, replacing the oil sending unit will correct the problem.
* After the test is complete, reinstall the oil pressure sending unit, start the engine, and confirm there are no leaks.

Posted on May 27, 2009

  • 3854 Answers

SOURCE: oil pressure problem

You oil pressure sending unit has gone bad, it's common to go bad and some even leak oil. 
The oil pressure sensor is on the back of the block on the passenger side, you can get to it from the top and not from the bottom. There are (2) switches back there that screw in to the block and you can only see it from the top of the engine. The Oil Pressure Sending Unit is the one wire harness with a green and white strip on it. The other switch has more wires to it. 
When you pick up the new sensor, make sure you get the right one. make sure you get the Oil Pressure Sending Unit which sends variable oil pressure and has only one quick connect for the wire connector. The oil pressure switch is the one that only activates the oil light on older engine
Once you get the right part at Auto Zone for around $9.00, disconnect the wire clip with the green with white strip on it. and use a deep spark plug socket with a extension and u joint to get the sensor out. The sensor comes with teflon tape already and no oil should leak out from the block. It as simple as replacing a bolt and reconnecting the wire connector. 
Good luck and hope this helps, take no more then 10 min to do but about 5 hours for the engine to cool off LOL

Posted on May 29, 2009

  • 850 Answers

SOURCE: 98 Camry 4 cy. - can oil completely leak out of

Firstly! Yes alloy engines will run quite along time with little or no oil!
oil warning lights are a waste of space!
if it fails to light up you dont have any warning do you!
i would like to know from you a little more of the story! as to were you driving at the time ?? did it have leaks prior & is the plug still in the oil pan?? or was motor burning oil
Cheers Rob.

Posted on Jul 17, 2009

  • 318 Answers

SOURCE: oil pressure gauge goes to 0 when idled, but goes

You could try thicker oil or stop using synthetic or add some lucas oil treatment or change the oil. The sender could be bad too. A diag is in order because if there is no presure the engine will soon die.

Posted on Dec 09, 2009

  • 12 Answers

SOURCE: '07 Avalanche LTZ says low oils pressure turn off

sounds like a bad oil pressure sending unit. or a bad oil pump would have to check with my tech2 & manual oil pressure gauge to diag.

Posted on Feb 22, 2010

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