Question about 1997 Jeep Grand Cherokee

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The oil pressure gauge keeps dropping down to 0 while i am driving

The oil pressure gauge keeps dropping down to 0 while the car is on.

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  • 316 Answers

If you don't hear any ticking or knocking while the pressure gauge drops, the problem is probably a failing "oil pressure sensor". If you do hear a ticking or knocking, the problem is probably a failing "oil pump".

Posted on Jun 03, 2009

  • stephanie doughtie
    stephanie doughtie Jan 02, 2014

    is the oil pressure sensor and the ol sending sensor not the same thing?

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1 Answer

Why does oil pressure fluckulates


Well it could be a faulty pressure sensor, or you could really have a problem with the oil pump or engine. As the engine warms up the oil gets thinner and pressure can drop if the engine is worn out.
You can check the oil pressure by using a mechanical gauge and bypass the gauge on the dash.

Aug 03, 2014 | 1999 Ford Explorer

1 Answer

1993 chevy pickup z 71 driving down interstate and check gauge light came on and oil presure dropped to 0. Truck died and cant start again


It could be the oil pressure sending unit, or the engine could really have no oil pressure.
If the oil pressure dropped to zero at highway speed, I would expect the engine to lock up or at least make alot of noise.
You may have to tow it home and check the oil pressure with a mechanical gauge, or replace the sending unit to see if the gauge on the dash reads pressure.
The fuel pump gets power from the pump relay at startup, then runs off power from that oil sending unit when the engine is running.

Dec 19, 2012 | Cars & Trucks

1 Answer

If my oil sending unit is out will my truck break down


yes,it reads oil pressure only,if its out as long as it was working fine before it went bye bye your fine,you won't blow up engine or break down.

Nov 28, 2012 | Cars & Trucks

1 Answer

The oil pressure gauge goes from 0 to all the way up and the needle moves back and forth while driving it checked oil its good now its clicking underneath the car and it felt like the transmission was...


First we would need to know when this occurs. Asuming the oil level is at the full mark!. If the pressure goes up during acceleration and down at idle when engine is fully warmed up, then this is normal. An engine requires 10 psi of oil pressure per 1,000 rpm ( ex. 20 psi at 2,000 rpm, 25 psi at 2,500 rpm, and so on ) . If the gauge is moving back and forth erratically at idle , i would say the gauge is bad. If it drops to 0 while accelerating I would say your oil pump is bad. If from time to time it seems to work and other times it seems not to work, I would say the oil pressure sending unit for the gauge is bad. If the pump failed you would start to here a Knocking noise from the engine in a short period of time. Use the above scenario's to narrow down what it may be.

Mar 27, 2010 | 2005 Nissan Altima

2 Answers

Oil gauge drops to 0 after driving about 30 min. However it still runs fine with no noise. I had the sensor changed and it still does the same thing.


Ok if you have replaced the oil pressure switch, you might want to have a shop put a guage on it, and see if it happens, while the gauge is on the vehicle..Just to get an accurate reading of the pressure from the oil pump itself....Your oil pump maybe going bad, and it is giving you intermidiate warnings...Another way you can check yourself, is let the vehicle run, and while the engine is running, keep checking the oil level on the dipstick, and make a mark of where it is...And when your gauge drops to 0, check it some more...now if the level is the same, then either your oil pressure switch is defected ( evev though you changed it already).. or your instrument panel is going bad... But if the level drops, when that happen, then you know for sure that your oil pump is bad... Goodluck..

Dec 21, 2009 | 2004 Chevrolet TrailBlazer

2 Answers

Come to stop 99 Ram oil pressure drops to 0 check gauges light.


Change the oil! The 318Cu in V8 (5.2 liter) engine has a problem with sludge build up on the oil pump pickup tube screen. This engine requires oil changes at or before 3500 miles with a high detergent oil.

Jul 06, 2009 | 1999 Dodge Ram

1 Answer

2002 jeep wrangler oil pressure gauge drops


When the gauge is at 0, is there any noise from the engine (tick, knock etc?) I would have someone put a mechanical gauge on there and read true pressure.Your driving pressure seems OK but if the low number is "real" something is wrong!

May 30, 2009 | 2002 Jeep Wrangler

3 Answers

Oil pressure on a 2004 5.3 liter silverado at idle is around 20


The pressure to be most concerned with is the reading in gear at idle with engine warmed up...Low end really should not be below 20. If pressure wanders, change the sending unit and check actual pressure with a mechanical gauge if necessary. The age and quality of your oil, as well as temperature all play a part in pressure, as well as internal wear from time & miles of use. If pressure changes with rpm, that is normal. 40psi is good while driving.
need more info just ask.

Apr 27, 2009 | 2004 Chevrolet Silverado

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