Question about 2000 Pontiac Bonneville

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How do I fix my oil pressure gauge? just got an oil change done so there's no problem there. gauge doesn't work. at all

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  • Pontiac Master
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I agree with edcarcal . Although chevy has problem with the sending unit I replace them alot even ones a few months old .
You should check the conection on yours' it would be in the back of the engine to the left of the distubtur shaft you will need a special socket to remove it costs 20 dollars and the new unit is about the same .
Its a 20 minute job

Posted on Mar 29, 2015

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  • Pontiac Master
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Problem is probably not the gauge but a failed, plugged or disconnected pressure sending unit on the engine. This part is not expensive or difficult to replace - consult a service manual for the vehicle for details, or take it to a shop and try having them replace it.

Posted on Mar 29, 2015

  • matt sylvester
    matt sylvester Mar 29, 2015

    where would i find that sending unit, where would it be located

  • EdCarCal
    EdCarCal Mar 29, 2015

    It should be near the front driver's side end of the engine below the intake manifold.

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1 Answer

Problems


Have a pressure test done with a mechanical pressure gauge to determine if you have oil pressure. If so then check the pressure sender unit or the wire to it for shorts.

Jun 25, 2013 | 2008 Suzuki SX4

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Oil pressure gauge is jumping from 20 to 40 psi. Is this a sign the oil pump is bad?


Probably not, as oil pumps are usually "forever" , unless the oil changes are not done and the system plugs up.
I'd recommend you find a garage that will remove the oil pressure sending unit and screw in a real oil pressure gauge, and test it.
Oil pressure switches that screw into the block fail occasionally, and dashboard oil pressure gauges sometimes fail also.
Be blessed.

Feb 23, 2013 | Cars & Trucks

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My trail blazer model 2003 have problem with gages where has done the below thinks. 1. engine cleaning through the oil 2. engine oil moter changes 3. change oil and filter If i have start the vehical the...


The check gauges light alerts you to the fact that one of the gauges is reading out of the normal zone. From what you have said I assume there is a problem with the oil pressure gauge in that it indicates the oil pressure is low. I suggest you remove the oil pressure sending unit and hook up a test gauge, see what the oil pressure really is. I suspect you just have a defective oil pressure sending unit.

Nov 07, 2012 | 2003 Chevrolet TrailBlazer

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

When i first start my truck it takes 45 seconds before my oil pressure gauge ever moves


First do an oil and oilfilter change, if that doesn't solve the problem check the oil pump and oil press valve. Your engine are running out off oil and you could damage the bearings.

Jun 25, 2012 | 1999 Chevrolet Silverado 1500

1 Answer

I changed the oil pressure sending switch, but my oil light still comes on when idling and goes off when accelerating


I have done some chrysler vehicles that the hole that the unit screws into has to be cleaned also, mostly durango's. But when you change a oil sending unit and it doesn't help, light or gauge. then the crankshaft bearings are worn and it's time for an engine rebuild or replacement.

Sep 26, 2011 | 1998 Plymouth Breeze

2 Answers

1986 ford thunderbird oil gauge on and beeping


I would check that the engine oil level is high, then I would check that the pressure is high enough by plugging a gauge into the oil pressure switch socket after removing the oil pressure switch.

There is a possibility that the oil pressure switch is bad, or the oil pump has failed, unfortunately.

Oct 13, 2010 | 1986 Ford Thunderbird

1 Answer

94 f350 7.3l turbo diesel looses oil pressure as rpm increase


Before you spend money on a new gauge. Get an oil pressure testing gauge for $20 , remove the oil pressure sending unit and test the oil pressure. If oil pressure at idle and 3000 rpm's is a-ok via spec's ( big money repair items) then its either the gauge a clogged or defective sending unit or the circuitry. (little money repair items)
You can also have this done at a repair shop.

Apr 26, 2010 | 1994 Ford F350 Crew Cab

3 Answers

The oil pressure gauge is going directly from 0-80.....as soon as you crank up the vehicle....Its running fine, no lights have come on, running smooth like normal, its just that the gauge in the dashboard...


It sounds like there is a problem with the oil pressure sending circuit. The oil pressure sender changes voltage according to the differences in oil pressure. If it is pegged all the way to the max, there may be a short (or open, depending on the way the circuit is designed). I would take it to a shop and have the oil pressure tested with a mechanical gauge first, just to be sure there isn't a problem with the relief valve on the oil pump. But if the oil pressure gauge isn't working properly, you won't know if there really is a problem with the oil pressure, and that could be catastrophic to the engine.

Feb 24, 2010 | 2003 Chevrolet Tahoe

1 Answer

Oil pressure gauge shows low / high / middle changed sensor did


Hello mb4494: My name is Roger and I will help you. If by changing the oil pressure sending unit the problem did not change. I would perform a oil pressure test. This is done by removing the oil pressure sensor and inserting a oil pressure gauge. This can be done by yourself or by a repair shop. This needs to be done on a cold engine. Start the engine and observe the oil pressure cold.as the engine warms up observe the pressure. The pressure will drop off as the engine warms up.Should the oil pressure drop below 10 to 12 PSI. then you have internal engine trouble. More then likely a bearing problem. Try dropping the truck into gear and see what the pressure drops off to. Again if the pressure drops below 10 to 12 PSI. you have a problem. I would also check to make sure you have the correct oil switch. a truck with a oil light uses a oil pressure switch. with a gauge you would use a oil pressure sending unit. Sorry for the long reply but want to make sure you check the pressure correctly. Please rate the quality of the answer as this is how we know the answer was correct. Thank You for using Fix Ya. Roger

Jun 16, 2009 | 2004 Ford F150

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