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Oil Pressure Idiot Light

shadonoz

SkyActiv Member
Contributor
:
State of Jefferson
:
2017 CX-5 GT AWD+
Does anyone know at what level the low engine oil causes the oil pressure light to illuminate in a 2017 CX-5 under "normal operation"?

  • Yes, it indicates low pressure, not level.
  • Yes, if the light's on, it's not "normal operation".
  • Yes, one must check the level and not rely on the light to tell them anything [except a failure].
  • I'm not asking for speculation or opinions... I'm asking if anyone actually knows.
 

shadonoz

SkyActiv Member
Contributor
:
State of Jefferson
:
2017 CX-5 GT AWD+
If you had read it, Ed, you would know it doesn't mention level, thanks.
 

Chris_Top_Her

Banned
Moderator
Contributor
:
San Antonio, Texas
:
'15 CX-5 Miata AWD
It's not based on level at all..it's based on pressure to a switch. But it's not a regular oil p sensor thats reads constant psi like on some older cars. You can get an oil blip because of oil starvation during some extreme maneuvering or something with adequate oil. I'll look in the workshop manual at home.
 

shadonoz

SkyActiv Member
Contributor
:
State of Jefferson
:
2017 CX-5 GT AWD+
Thanks, Chris. I guess I didn't phrase that very well. I know it's an oil pressure idiot light.

I just want to know how much oil would be in the system if you were going down a straight, smooth road at a constant speed and the light went off due to the low pressure caused by the low oil level.

Fer instance, if it's 2 qts low, will it necessarily light up? 2.5?

I'm just curious.
 

Chris_Top_Her

Banned
Moderator
Contributor
:
San Antonio, Texas
:
'15 CX-5 Miata AWD
Thanks, Chris. I guess I didn't phrase that very well. I know it's an oil pressure idiot light.

I just want to know how much oil would be in the system if you were going down a straight, smooth road at a constant speed and the light went off due to the low pressure caused by the low oil level.

Fer instance, if it's 2 qts low, will it necessarily light up? 2.5?

I'm just curious.
That I don't know. The manual doesn't detail the operation of the switch as such.
 
:
GA prior 16 CX5 GT
:
20 CX5 GT + Prem
It will be when the oil pump starts picking up air instead of returned oil. The person I sold my miata to did not check the oil or change it until her father checked it a lot later and it would not even register on the dipstick but was still running fine. I think it is way low as the pump pickup is designed to float to near the bottom of the pan...
 

GJ-Molestor

Banned
:
2011 BMW 528i, 2015 Mazda 6, 1995 Nissan Maxima Manual
It will be when the oil pump starts picking up air instead of returned oil. The person I sold my miata to did not check the oil or change it until her father checked it a lot later and it would not even register on the dipstick but was still running fine. I think it is way low as the pump pickup is designed to float to near the bottom of the pan...
Not registering on the dipstick means the engine is at about 1.5quarts low or more. The oil pressure light will typically only come on when there is about a quart left in the crankcase. It could also come on if you have severely neglected your oil changes for a long period of time. Basically, when you see that light it's almost always too late for the motor and you will certainly get some sort of audible warning that oil is needed long before the light comes on.
 
:
2019 CX-5 GT 184 2.2 twin turbodiesel auto - Sonic Silver
Not registering on the dipstick means the engine is at about 1.5quarts low or more. The oil pressure light will typically only come on when there is about a quart left in the crankcase. It could also come on if you have severely neglected your oil changes for a long period of time. Basically, when you see that light it's almost always too late for the motor and you will certainly get some sort of audible warning that oil is needed long before the light comes on.
Sorry but where are the facts to support this statement. I’ve trawled the Mazda tech info and it isn’t published so have purposely avoided making a subjective comment.
 

shadonoz

SkyActiv Member
Contributor
:
State of Jefferson
:
2017 CX-5 GT AWD+
Sorry but where are the facts to support this statement. Ive trawled the Mazda tech info and it isnt published so have purposely avoided making a subjective comment.
Facts? He don't need no stinkin' facts!! (blah)
 
Does anyone know at what level the low engine oil causes the oil pressure light to illuminate in a 2017 CX-5 under "normal operation"?

  • Yes, it indicates low pressure, not level.
  • Yes, if the light's on, it's not "normal operation".
  • Yes, one must check the level and not rely on the light to tell them anything [except a failure].

  • I'm not asking for speculation or opinions... I'm asking if anyone actually knows.
I had a same symptom with my 18 CX5.
Usually, Oil Pressure lights illuminates when oil level is dead low. Like 1qt left in the engine.

I’m mechanic and I working on cars everyday.

Anyways, I of course do an oil change myself but two weeks later, the oil pressure light on.
Checked oil level immediately >good
Checked oil pressure by using a pressure gauge> good
So, I took it to dealership to have them look at it because I thought it is an Oil Pressure Sensor issue and that should be under warranty.

Told to service advisor what I have done and checked.
Next day, I’ve got a phone call from dealership and states that I installed aftermarket oil filter and that might be an issue.
I said, I don’t think so. But I authorized to have them do an oil change again because they told me if that doesn’t help, they not gonna charge me for it. Plus, they told me there is a TSB for this problem and an oil change is a first step to go further.

Well, It turned out that was it.. I ended up paying $265 for Oil Change and Diagnostic fee..

So, if you have installed an aftermarket oil filter, change to the Genuine parts to see what’s going to happen.

Good luck,
 

Gozo

2020 Mazda6 2.5T
Interesting. So what brand of filter were you using? If the pressure and oil level were fine; I wonder what the sensor was sensing to throw an error.
 
:
2018 AWD GT Premium Red/Black
Anchorman, this is what your reply looks like to me:
1586453888209.png


I'm a little curious to see what you're replying to. Maybe I'll take a peek. :)

I think this way is better for my blood pressure. Now I just wish I could auto-ignore posts that link to Scotty Kilmer videos.
 
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