Question about 2001 Pontiac Bonneville

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Oil pressure gauge

Reads oil low but oils ok could it be faulty pressure switch

Posted by Anonymous on

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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StormStrikes
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SOURCE: oil pressure gauge suddenly reads maximum

Are you referring to the oil pressure gauge on the dash? If so, that is most likely the oil pressure sending unit having gone bad. The sensor runs about $40 - 50 (at least the last time I had to replace one on that engine). They are not terribly difficult to replace and I believe its a three wire sensor located back side of the engine, on the passenger side area. Its in a kind of tight spot and takes a bit to get it completely screwed out, but it can be done.

When they go bad, they typically will cause the gauge on the dash to read maximum oil pressure. You should be okay to run like that until you can get a new sensor as long as it is reading maximum oil pressure on the gauge and not low or no oil pressure on the gauge.

Posted on Jan 04, 2009

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localwonder
  • 6784 Answers

SOURCE: High oil pressure reading

Hi, this is a oil pressure sensor malfunction. the gauge is getting a distorted reading from the sensor. replacing the gauge will fix this issue. also, check the fuse box for blown fuses.

Posted on Mar 01, 2009

ourhowse
  • 2007 Answers

SOURCE: 2000 Bonneville oil pressure gauge reads 120psi???

Has it always been like that, or just since the oil change?

Posted on May 18, 2009

Molson02536
  • 3854 Answers

SOURCE: 2002 Pontiac oil gauge read full pressure at all

The oil sending unit has gone bad and needs to be replaced. The sensor is under the exhaust manifold and above the oil filter on the V6. Replace the oil pressure sending unit, once they fail they may start to leak oil soon. Good luck and keep me posted. 

Posted on Jun 29, 2009

  • 6982 Answers

SOURCE: Oil Pressure Guage

Oil pressure is read by the sending unit, not created by it. If you replaced the sender and do not see a minimum of 20psi there is something wrong inside the engine.Some people will tell you that 5psi is "safe". In reality, in an otherwise perfect engine it may be but in real world application, the 20psi number is the lowest I'd ever accept in any engine.(at idle) Running pressure is influenced by temperature and oil grade, but this should not vary dramatically.
It is best to attach a mechanical oil pressure gauge to the engine and in that way, you can read the exact pressure. If the mechanical gauge reads the same or very close to what you see on the dash, then the reading is correct and if low you will need further diagnosis to determine why.

Posted on Oct 20, 2009

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2 Answers

I experienced twice an orange engine oil pressure warning light and after the car wont move. I switched off the car and after ten minutes it moved. what is the problem


While an electrical fault or a faulty switch could put the light on, it is such an important light it should never be ignored and the reason for it established immediately. As far as the owner is concerned that means lifting the bonnet and checking the oil level and adding more if the level is low. If it isn't low the car should be recovered to a repair shop. Driving further could be very expensive and very inconvenient...

If the oil pressure light has switched on because the oil pressure is low then continuing to drive will soon wreck the crankshaft bearings or cause crankshaft or camshaft seizure. Damage happens so quickly if the oil pressure is lost at motorway speeds the engine is likely to be severely damaged by the time the car is stopped.

I strongly suggest you have the reason for the light switching on established and repaired.

Apr 12, 2016 | Cars & Trucks

1 Answer

What is wrong when low oil pressure light comes on?


I can think of several things to check. low on oil, oil thinned out ,change oil, oil filter blocked , oil filter relief valve stuck open, oil pressure switch faulty. Best to remove oil pressure switch and fit a oil pressure gauge to get a true reading. If OK just replace the switch.

Aug 11, 2014 | 2004 Lincoln Navigator

1 Answer

Engine oil psi low and light is on


Check oil if ok then observe, engine noisy? Clanking? If so you need to pull oil pressure switch and take manual reading with oil pressure gauge. If engine is running fine with no irregular noises Probly changing oil pressure switch wouldn't be a bad idea.

Oct 03, 2013 | 2005 Nissan Frontier

1 Answer

Oil pressure down


This could be worn bottom end bearings, a worn oil pump, a weakened oil pressure relief spring, or a faulty gauge. I once saw a Landcruiser with a faulty gauge.

Get another good gauge into the oil pressure port as a first step. If it gives the same low reading try a temporary fill of thicker engine oil. If this causes the reading to rise, it is probably worn bottom end bearings, not unusual in a 95 model.

After that you will need to inspect the oil pump.

Apr 12, 2013 | 1995 Toyota Land Cruiser

2 Answers

How can i fix the oil pump


see this tips and fix it. God bless you
The oil pump supplies oil to lubricate your engine. If the oil pump is worn or is not turning, the engine will suffer a loss of oil pressure, which may result in engine damage or engine failure.
The first sign of trouble may be a low oil pressure warning light, a drop in the normal reading on you oil pressure gauge (if your car has one), or the appearance of ticking or clattering sounds from your engine.
As a rule, most engines only need about 10 PSI of oil pressure for every 1,000 RPM of engine speed. Oil pressure will read higher than normal when a cold engine is first started because the oil is thick. Oil pressure will gradually drop as the engine warms up and the oil thins out. So normal oil pressure on a warm engine cruising down the highway is typically 30 PSI up to 45 PSI.
SYMPTOMS OF OIL PUMP TROUBLE
The first thing you should do if any of these symptoms occur is to stop your car, turn off the engine, let it sit for a few minutes, then check the oil level on the dipstick. If the oil level is at or below the ADD line, add a quart of oil to bring the level back up to the full mark. Add as much oil as is needed to raise the level to the full mark. Then restart the engine. If the warning light remains on, or the oil pressure reading does not climb back up to its normal range, or the engine noise does not go away, you may have a bad oil pump.
The other possibilities include a bad oil pressure sending unit, or a problem with the oil pressure warning light circuit or oil pressure gauge.
OIL PRESSURE SENDING UNIT
If the engine is NOT making any unusual noises and seems to be running normally, and the oil level on the dipstick is FULL, but you are still getting a low oil pressure warning light or low gauge reading, the fault could be a bad oil pressure sending unit.
The oil pressure sending unit is mounted on the engine block. On some applications, there is a spring-loaded pressure-sensitive diaphragm with a switch inside the sending unit. This switch completes the circuit to the low oil pressure warning light if oil pressure drops below a certain threshold. The unit may stop working if the diaphragm inside fails, if the switch is stuck, if the small hole that allows oil to enter the sending unit becomes plugged, if there is a loose, corroded or broken wiring connector at the sending unit, or there is a fault in the wiring circuit between the sending unit and warming light.
On vehicles that have an oil pressure gauge (electronic, not mechanical), the oil pressure sending unit has a small rheostat inside that sends a variable voltage signal to the oil pressure gauge when the diaphragm moves. A worn spot on the rheostat or any of the other problems just described for the simple pressure-type oil pressure switches can cause a problem.
FORD'S FAKE OIL PRESSURE GAUGE
On many Ford vehicles that were built from 1980 through the 1990s, the oil pressure sending unit has two switches, a low pressure and a high pressure. These vehicles also have an oil pressure gauge, but the reading on the gauge is not a true indication of real oil pressure. As long as the pressure to the sending unit is between high and low, the gauge will read normal. If oil pressure drops and trips the low pressure switch, the dash gauge will now read low. Or, if oil pressure goes up and trips the high switch inside the sending unit, the dash gauge will read high. Consequently, don't rely on the oil pressure gauge for an accurate reading in these vehicles. It is only a gross indication if the oil pressure is low, normal or high.
OIL GAUGE PROBLEMS
If the engine is NOT making any unusual noises and seems to be running normally, the oil level on the dipstick is FULL, and you have replaced the oil pressure sending unit but are still getting a low oil pressure reading on the dash gauge, the fault could be in the wiring circuit between the sending unit and gauge, or the gauge itself might be bad.
Check the wiring connections on both ends as well as wiring continuity between the sending unit and gauge. If no wiring faults are found, hook up a pressure gauge directly to the oil pressure port on the engine and check oil pressure with the engine running. If the engine-mounted gauge shows normal oil pressure but the dash gauge is reading low, the problem is a bad dash gauge.
On the other hand, if the engine-mounted pressure gauge reads low and you have done all of the above, chances are the oil pump is worn, or it is not picking up enough oil because of a restriction or blockage in the pickup screen in the bottom of the crankcase.
OIL PUMP PICKUP PROBLEMS
The pickup tube has a screen on the end to prevent large chunks of anything bad that ends up in the crankcase from being sucked into the pump. But we are talking BIG chunks of debris, not normal wear particles or carbon or dust or other microscopic-sized abrasive particles that can cause pump wear over time.

Sep 28, 2012 | 1996 Toyota Tercel

1 Answer

Low oil presure


perform a master oil pressure test. this is done by removing the oil pressure sending unit and installing a oil pressure gauge. if the reading on the test gauge is ok, the sending unit needs to be replaced. if the pressure reads low on the test gauge, there may be excessive bearing wear or you may have worn valve guides. good luck!

Apr 29, 2010 | 1997 Ford F150 Regular Cab

2 Answers

What does a low oil pressure alarm mean


It means the sensor that detects your oil pressure has seen a situation where the oil pressure is too low and engine damage will result. Could be just a bad sensor, but better have it checked with a mechanical gauge to see exactly what the pressure is.

Jan 10, 2010 | 2001 Pontiac Montana

2 Answers

Low oil pressure light is on on 2000 lexus rx300. Doesn't need oil or an oil change. Not leaking oil.


try replacing the oil preasure switch, if that doesnt solve your problem then have your oil preasure tested, if it really doesnt have oil preasure it will cause internal engine damage so start with the switch and then go from there, hope this is helpful.

Nov 29, 2009 | 2000 Lexus RX 300

1 Answer

The "check gauges" light comes on intermittently on my 2001 jimmy


First thing I'd check is the oil level, coolant level. The check gauges light is illuminating because on of the gauges is below a certain pre-programmed threshold. The light is very similar to the old idiot lights that came on when it was too late. Cars used to have gauges and in the earlly 90's the manufacturers figured out that the majority of owners did'nt even read the owners manuals, let alone know how to read a gauge. So they started putting in idiot lights that would come on when there was a problem, they figured even an idiot could see a red light on and know there was a problem. The only problem was that the pressure switches that turned the lights on were set very low. Take for example an oil pressure switch (OPS). The switch is designed to close and complete a path to ground for a light, the problem is it closes aroung 3psi. Normal oil pressure is around 30, at 3 psi the cam and crank bearings are starving for oil, by the time you see the light on it's too late, the damage has already been done to the engine. So the manufacturers started installing gauges and lights to cover all the bases. So if I had to take a guess, I'd say you have and oil pressure problem. Check the oil, if it's low figure out where it's going, if it's not then you may have a faulty sending unit, confirm this by installing a manual oil pressure gauge in it's place. If the manual gauge shows low oil pressure then there may be some debris/sludge floating around in the oil pan stopping up the pickup screen or it could be a faulty pump.

Aug 24, 2009 | 2001 GMC Jimmy

2 Answers

Low oil pressure light is on


Until u have a mechanical test gauge hooked up to verify the oil pressure is ok assume it is not a good idea to drive, low oil press will destroy a $4000.00 engine very quickly.

Jun 17, 2009 | 1995 Chevrolet Camaro

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