Oil sensor light on? Sender?

Tiny
LUCKYCARL
  • MEMBER
  • 2001 CHEVROLET CAVALIER
  • 2.0L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 148,000 MILES
My oil sensor light comes on when my car is stopped or idling and the engine is hot, but the engine is not over heating. As soon as I start driving again the light goes off. Checked the oil and it has the correct amount of oil and has never leaked any oil. I plan on getting the oil changed this weekend, as it is past due for this, hoping it might help. Just started happening the last few days. Any information would be helpful.
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Wednesday, July 20th, 2016 AT 9:14 PM

22 Replies

Tiny
CARADIODOC
  • EXPERT
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.
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Wednesday, July 20th, 2016 AT 9:42 PM
Tiny
LUCKYCARL
  • MEMBER
I am going to change the oil myself, but I can barely get my hands on the filter from under the car. Do I need a special tools to take the filter off?
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Saturday, July 23rd, 2016 AT 9:19 AM
Tiny
CARADIODOC
  • EXPERT
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.
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Saturday, July 23rd, 2016 AT 8:42 PM
Tiny
2CARPROS-ARCHIVES
  • MEMBER
  • 2000 CHEVROLET CAVALIER
  • 99,000 MILES
How do you change a oil sending unit on a chevy cavailar
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-2
Tuesday, July 21st, 2020 AT 2:20 PM (Merged)
Tiny
JDL
  • EXPERT
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.
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Tuesday, July 21st, 2020 AT 2:20 PM (Merged)
Tiny
D69MTLHAIR
  • MEMBER
  • 2000 CHEVROLET CAVALIER
Engine Performance problem
2000 Chevy Cavalier 4 cyl Two Wheel Drive Automatic

my knock sensor on my cavalier went out and was leaking bad.I relpaced it and as soon as I started the car up to make sure it was good, another oil leak began flowing from another sensor in the same area. Wtf? Can you tell me what the name of it might be and why on earth another leak would spring from the same area except a different sensor? Id like to know the name of what I need so I dont look like a dork at the auto store.
Thanks
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Tuesday, July 21st, 2020 AT 2:20 PM (Merged)
Tiny
WRENCHTECH
  • EXPERT
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.
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Tuesday, July 21st, 2020 AT 2:20 PM (Merged)
Tiny
JAY HASTY
  • MEMBER
  • 1997 CHEVROLET CAVALIER
  • 2.2L
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 200,000 MILES
How do I check the oil pressure switch?
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
JOHNNY G.JR
  • MEMBER
Ground the sensor wire going to it.
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
HMAC300
  • EXPERT
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.
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
SMALLBUTTOUGH89
  • MEMBER
  • 1997 CHEVROLET CAVALIER
  • 4 CYL
  • FWD
  • AUTOMATIC
  • 130,000 MILES
Lately my oil light has been flicking on and off, but only when idle. It doesn't come on and stay on. I check to see if there was an oil leak and there wasn't. A guy at an auto part store said it could be my oil pressure switch going out.

Could that be the problem and where exactly is the oil pressure switch located in a 1997 Chevy Cavalier?
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
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?] ).

Thanks for using 2CarPros. Com!
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
SMALLBUTTOUGH89
  • MEMBER
The engine is a 2.2L

How do you know if the wiring is causing the problem?
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
BLUELIGHTNIN6
  • EXPERT
Just make sure the wiring is connected properly to sensor and inspect the wiring for damage (i.e. bare spots, burnt spots etc..).


https://www.2carpros.com/forum/automotive_pictures/261618_Noname_484.jpg

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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
JAMIETACO
  • MEMBER
  • 1997 CHEVROLET CAVALIER
  • 161,000 MILES
Im trying find pictures that show me where my oil pressure switch is and I cant find any to help the motor in my car is a 2.2 4cyl its a base model andi need help please send my pictures to help me locate it thank you
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
CARADIODOC
  • EXPERT
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.
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
MARKKRUIZENGA
  • MEMBER
  • 1996 CHEVROLET CAVALIER
Engine Mechanical problem
1996 Chevy Cavalier 4 cyl Front Wheel Drive Automatic

hello

can anyone tell me where I can find an oil pressure sending unit on a 1996 cavalier 2.2L motor? Much appreciated

thanks
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
JDL
  • EXPERT


https://www.2carpros.com/forum/automotive_pictures/170934_chevy_cavalier_oil_pressure_switch_1.jpg



Hello, my info gave the above location. Toward driver side of engine.
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
TRUTHGIVER
  • MEMBER
  • 1989 CHEVROLET CAVALIER
  • 6 CYL
  • FWD
  • AUTOMATIC
Could you please tell me where the oil pressure sensor is located on this car?
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)
Tiny
JDL
  • EXPERT
My info showed this location, below.
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Tuesday, July 21st, 2020 AT 2:21 PM (Merged)

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