Can't figure out why my low oil light is on. I have the 1.5 plain jane engine in the 90 Civic LX sedan. It is full of oil. Any ideas??? Thanks guys.

 

check you oil sensor had the same problem with my crx

 

Its not an oil level light. Its an oil-pressure light. Only comes on when you have less than 4.6 psi of oil pressure.

If your oil is up to the proper level, it means you either have a faulty sender, or it can mean you have some issues with your bearing clearances being too loose and not being able to hold up good oil pressure.

 

Hmmm. Well I'll change the sending unit and see if that fixes it. Prolly a cheap part and it won't hurt to replace it even if it doesn't need it. Is that the unit that is on the backside of the block that has 2 seperate wires going into it? Thanks.

 

It's the one that has a single wire going to it. (usually covered by a black boot)

The one with two wires is the thermo switch for the radiator fan.

 

Your oil sender is bad. What happened was that it started to leak internally and oil creates low resistance, hence the cel
change ur oil sender.

 

I hope all of the recommendations to change the sender are right. Thanks guys!!!!

 

Changed the sender and the light is still coming on. At first it was on immediately when I started it. Then it flickered and now it is out but only when I drive it in a straight line. When I make a turn it comes on and then goes out when I straighten it back up. It is full of oil with a quart of Lucus Oil Treatment in it. I plan to borrow an oil pressure guage to read the oil pressure. Any ideas on what else it might be? I shook the wire and the harnesses and didn't get anything. Thanks.

 

I hooked the guage up and it read nothing at first until I revved it just a little. Then it read right at 10. I revved it up and the pressure started dropping so I let off and let it idle. Back to 10. As it warmed up, the pressure started to rise. It was on the rise and got all the way to 30 at idle. I was waiting for the fans to come on as a service manual said to read it after the fans cycle twice. Then it said that the pressure is supposed to be 10 at idle and 30 at 3000 rpms. It got to 30 at idle! There was some kind of smoke coming out of the catback and I assume it is because it is cold here in Western North Carolina and I hope it is just that kind of smoke that comes out when its cold. You know that kind? Well then I heard a blub blub kind of sound start coming out of the cat back so I turned it off. Any ideas or opinions? Thanks alot guys! Don

 

Any ideas????

 

hmmm, i hate to bring this back from the dead but you never got answer, i have a feeling it might be your bottom end or the oil pump...(was the replacement sending unit brand new)

 

In my case it was the oil pump.
It often is.

You can tell if the oillight stays on longer then a second when you turn the ign on.