The behavior of the oil light coming on at low RPMs (when you take your foot off the gas) and disappearing when you accelerate is often a sign of this. It could be an issue with the oil pressure sensor, which may be giving false readings, or it could indicate an actual oil pressure problem, such as a worn oil pump or a partially blocked oil passage. To diagnose, I would recommend starting with the oil pressure sensor, as it's a relatively inexpensive part to replace. If replacing the sensor doesn't fix the issue, you should have the actual oil pressure tested with a mechanical gauge to see if the pump is functioning properly. Low oil pressure can cause long-term engine damage, so it's best to address this as soon as possible.

 

Bad old school DIY response about an oil pressure light ^^^^^^^^^^^^^^^^^^^^^^^^^^^
It has ben a while since the last member responded (03-21-2024 04:12 AM) so changes are very likely the issue was already resolved. But as I don't like to read less than good advice on threads, I participate on so let me respond>


To preference the engine is a Skyactiv Mazda engine which is a little different then past Mazda engines as well other auto manufacture engine both in design and quality of the engine and the engines internal parts.

The first step is using a diagnostic scanner and connect to the OBDII diagnostic connector and retrieve all the DTC pending, permanent and also check the I/M monitors. This can give you big clue before starting to "GUSS" your service path method to resolving the issue.
You NEVER, NEVER start guessing and replacing parts without first confirming that they have failed. Oil light coming on even intermittently needs the attention of first verifying that the oil pressure is correct. An oil pressure sender is inexpensive, and engine is not. Checking the oil pressure can only be done with *physically connecting a manual oil pressure gauge usually at the oil pressure sensor. *It is 15 minutes of labor extra time even if you are only replacing a sender.

Or as you still need to be at that area of the oil pressure sender to do the *proper mechanical oil pressure check when you remove the oil pressure gauge you can check for continuity with the sender and the connector. It is common sense to have a new one ready to install in case the mechanical test proves positive.



The oil pump in the Mazda engine either works correctly or not with very few exceptions and most are oil and filter neglect or very high mileage engine. So, it is highly unlikely it is an oil pump however the mechanical oil pressure testing can also test for the.
Low oil pressure can cause engine damage at ALL engine speeds BTW in short terms engine operation.

 

Ok. I've seen plenty of your drivel to know this is when I, absolutely(!), stop taking ANYTHING you say seriously.

There is NOTHING "Skyactive Mazda" about the first gen CX-9 V-6 engines (3.5 or 3.7). They are FORD engines, through and through. With some being built in Japan, that does NOT make them "Skyactive," and it certainly doesn't make them more Mazda. They could ALL have the typical Ford issues that plague these engines.

If you don't believe me, go pop the hood on any Ford with a 3.5 NA, or Lincoln with the 3.7. They're IDENTICAL. That also means the common problems are identical, too. The list includes, but is not limited to, (internal) water pump failures and timing chains, and some other issues.

My advice would be to start hunting for this issue concerning the Ford Edge, Explorer, Taurus, Flex and others with the 3.5, as there are a lot more of those running around than the CX-9.

 

Ok then... this posting as well other I have read since you joined this forum dis qualifies you as knowing much helpful advise from you.

It does not matter is you have a 1959 MGA the way you check for an improper oil sender vs an actual oil pump issues are relatively the same. The exception starts in 1995 with OBDII and CANbus. Maybe stick with what you are good at and giving automotive service advise is not you forte.

BTW this is a MAZDA NOT FORD forum so unless you post in the none or other platform/vehicle section referring to other platforms is to really helpful or respecting the forum based plat form which is Mazda!

Even a MORON can read that many of my responses are generalized to fit how trouble shooting is to be done correctly and not guessing or running to the internet for the first DIY solution that may or not be correct!

Conclusion, your service advice should be consider by anyone on this MAZDA forum questionable at best! Follow poor advise from a member they do not have any skin in the game should they be incorrect should you damage your vehcle follow them. There are reasons wh there are Factory Service Manuals , and not to do things your way or the DIY way to achieve the fastest, correct and accurate results.

Here is an example of a 3 year old posting style as a new member LOL
Driver's door mirror glass vibrates, BOSE makes it worse - Mazda Forum - Mazda Enthusiast Forums

 

You are correct ok the proper way to test for oil pressure issues with the sensor and sending unit. But the vehicle has a Ford engine. They weren't posting something random about Ford, they were responding to the original posters issue about their Mazda that has a Ford Engine in it. It is not a SkyActive engine. The first year a SkyActive engine was used in the CX-9 was in the 2015 model. Please get your facts correct, there was no need for anyone to respond in such a negative manner. This is supposed to be a place to get help, so be helpful or don't respond at all. Hopefully the original poster fixed the issue. Maybe they could please let us know what the problem actually was and if they were able to resolve it.

Always be kind.

 

wow thank you for the service comment. You think I might know something? LOL
Iam so happy that you posted Iam correct lol That made my laugh .
Dude just curious are you in the automotive service field of study or work? . Regardless of the actual engine manufacturer this is a Mazda forum.
Skyactiv or not the information about proper service procedures on the subject are correct if not empirical.
Do you have any idea how many engines are used in different auto manufacturers then their own. I know most at least from about 1975 to present ? So when someone like you and other compares them on the wrong forum platform talking about service recommendations I definitely have something to say.
As one example BMW uses a A Chrysler engine in one of their very popular vehicles. And that platform has one of the largest if not largest member count in the world and not many talks about the Chrysler engine .


you come here as a new member and know nothing about it’s members especially myself.
maybe before you leave a lasting bad first impression go learn about a member before speaking for others. If they don’t like what Impost that’s up to them not you especially you with your very first posting as a new member.

Welcome to the Forum

I know the Mazda Dealership in SanJose very well. When I lived in Santa Cruz they would occasionally call me do help in the service department.
I bet you wonder why…. ROLMAO . Let me put it this way there are a small handful in that town that have my credentials or decades of practicing experience.