Question about 2006 Pontiac Grand Prix

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Low oil pressure light came off and on

Oil changed month ago only did twice and now nothing, oil is full

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Oil sending unit for sure! it should be on driver side near botton of engine and will have a pig tail connector with 2 wires leading to dash board gauge. When you replace, purchace a oil switch socket and make sure oil is drained. Pull out old one, the new one should have some threading material on thread. DO NOT overtighten. Just a little beyond the white threading material. Hope our answers help! Good luck and ask again if you have further issues

Posted on Dec 01, 2014

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I agree. The oil sending unit (sensor) could be giving a false reading. Replace the sensor, have the codes cleared. Also know, that disconnecting the battery multiple times will\can cause the computer to send out false defaults and thus check engine light etc will come on. I also suggest having the mechanic who did your oil change (if applicable) do a pressure test on your cylinders as you may also have bad "O" Rings. This will only cause your engine to burn oil, miss slightly, however, will progress over time if not corrected

Posted on Dec 01, 2014

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Since it happened only twice, I would wait to see if it happens more often before replacing the oil pressure sending unit. The car will run fine even if it says low oil pressure that is due to a defective oil pressure sending unit. The only time there would be a problem is if the car really did have low oil pressure and you did nothing about it.

Posted on Dec 04, 2014

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Posted on Jan 02, 2017

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SOURCE: '92 GMC PU has low oil pressure

With that kind of maintenace pump and bearings should be ok,the oil pressure sending units get weak on these models I have replaced alot of these for this same condition.The check engine light reads its voltage from the sensor.

Posted on Aug 22, 2009

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Low oil pressure has little to do with oil level. The best is to take it to a service agent to have the oil pressure checked. It is very possible that you have a faulty pressure switch, and just changing the switch will solve the problem, but if you have an oil pump problem, causing low pressure, you have a major problem. Have it checked.

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The oil pump could be bad, or going bad. Oil pressure is effected by wear on the crankshaft main bearings and camshaft/s bearings. If those bearings are bad, that would make it lose oil pressure, but I wouldn't think it's time for a new motor at that mileage!!! I would find out what the actual oil pressure is, using a "wet gauge" or oil pressure gauge. The oil pressure sending could also be bad, giving false readings.

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either your pressure is low causing the light to come on , and dangerous to your engine , or the oil pressure sending unit is dead. It is just a small pressure switch that screws into the side of the engine block and reads the oil pressure. If the pressure is low , or the sensor is dead , the light comes on. Oil pressure sending units die a lot more often then oil pumps , and they are not expensive to buy , or hard to install. The hardest part of the job is actually locating on your engine. Its location should be easy to find out online.

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Check oil light is on and the car is making noises , I just got a oil change one month ago.


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How low is "slightly low"?

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3 Answers

Oil light on when oil is full


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Mar 20, 2010 | 1998 Toyota Camry

1 Answer

Oil lamp goes off. full of oil. lamp will go out


The oil light may be defective, but make sure that you have enough oil pressure @ idle. It will not matter how much oil is in there if there is no pressure. If the pressure is low, it is either the oil pump, or the oil system is clogged up somewhere like at the pick up tube at the bottom of the engine block.
There is a solution that you can add to your oil to clean the system. You have to run it a few miles and change it.
Pressure increases with RPMs.
Good Luck.

Feb 02, 2010 | 1998 Plymouth Voyager

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