Oil sensor light on? Sender?

The "Oil" warning light refers to low oil pressure, not level. If you are lucky, the sending unit may be defective. The oil pressure will go down at lower engine speeds. Forty pounds is normal. Most warning lights turn on at around ten pounds.

There are two other common causes of this symptom. The oil gets thinner when it is hot so it is easier to run out of the engine bearings. That makes it harder to keep the pressure up when the engine is pumping it at a low volume at low speeds.

The other cause is worn engine bearings. At the mileage you listed that really should not be a problem yet. If the problem persists after the oil change, your mechanic can check the actual pressure with a mechanical gauge.

Can't answer that exactly because I have to see where it is and the type and size. If it's the really small spin-on filter, you may be able to loosen it by hand, but GM isn't known for putting them where they're easy to get to. We used to be able to get a band-type filter wrench on almost any oil filter, but now it's common to have better luck with a cup-type tool that you turn with a ratchet. There's a lot of different sizes. You might find the right one by testing them on the new filter, and hopefully the old one will be the same.

These have two different engines so here are both locations below. The info I looked at was for 2.2L engine. The oil pressure switch is near the oil filter.

Check out the diagrams (Below). Please let us know if you need anything else to get the problem fixed.

Your knock sensor?

I don't think so. The knock goes into a blind hole and doesn't seal in anything. It can be completely removed without leaking anything.

If your talking about the oil pressure sender, then that should have solved your leak. I don't know what else you could be referring to unless you can post a picture of it.

Ground the sensor wire going to it.

These work by grounding out the signal to make the gauge move it can also be your dash is in need of repair as they are digital and will do this. If switch is bad it will throw a code and most of time it is just replaced instead of testing.

Yes, a faulty engine oil pressure sensor could cause the light to illuminate as stated. However, it may also be a faulty oil pump. The sensor is much cheaper of repair than pump so I would start with inspecting wiring to the sensor. Your vehicle's engine oil pressure sensor is located on left side of engine ( for pic. Diagram post your engine size [2.2L or 2.4L?] ).

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Just make sure the wiring is connected properly to sensor and inspect the wiring for damage (i.e. bare spots, burnt spots etc..).

I can't get into the service manuals to look for a drawing, but the oil pressure sending unit will always be near the oil filter. It usually has two wires plugged into it.

Hello, my info gave the above location. Toward driver side of engine.

My info showed this location, below.