I have the above issue with my cx-9 it’s currently in the shop. It’s had 3 different pressure sensors replaced on it and the wiring harness as well oil is changed regularly using 5w-20 which is what it calls for. The shop changed the oil pump and pickup tub water pump and timing chain kit as it was recommended but the light is still coming on at idle after doing all this me and the shop are scratching our heads at this point

 

Have they put a gauge on it?

 

I see you said they changed the OIL pump.
How many miles on the engine?
Iam sort of wondering why they didn’t pull one bearing cap just to examine it? Also how did they determine the original oil pump was bad.
Much as I really hate to agree with that other member I would check the oil pressure mechanically. Report what the psi is for cold start and then after the engine is at operating temperatures. Then while parked slowly raise the rpm and note the rpm and psi when the light goes out .
What I did not see is if they reported the ECU information.
The other thing 5w20 is what is the basic viscosity not be what you should use? Besides the other choices would not cause a flickering oil light.


Not sure who has been replacing all those oil pressure senders with out checking them first????


A service shop that is scratching their head not knowing the cause , well time to find a better qualified service shop.

 

Oh and Welcome to the forum

 

The shop was going by what the dealership said that I bought the car from I’m not 100% sure how they completely came to the terms that’s what it needed cause the dealership won’t let me know what shop the car is at this was the second shop that told the dealership that’s what need to be changed the first said they didn’t have the equipment needed to pull the engine but they had subjected to change those parts and everything that I’ve read online has said that’s what needed to be done when this light happens they tried changing just the sensor like I stated it’s had 3 replaced before even taking it to the shops the car shows if I remember correctly which it’s been about month since I’ve taken the vehicle has like 160000 miles on it

 

Wow what a bunch of bad information told to you???

The first thing I would do is go to a Mazda dealership and request a VIN service history. They may have a small fee to print one up but you will at least have a true idea what was done at MAZDA.

The next is to find a service shop in your city that has a sign or advertises in their ad ASE. This way you will at least get a real certified mechanic or diagnostic technician to do the work correctly or at least do an hour diagnostic and give you an estimate for the corrective service.
You are missing from others what was found in the ECU which there will be information relating to the oil sender electrical or mechanical issue. I tend to rule out mechanical somewhat because a shop more than likely miss guessed the service needing the replacing your oil pump

 

So got the Mazda back and apparently the dealership was wrong it was the sending unit was bad and it did fix the light

 

No comment beyond reading again post 6 line 1...

Glad to read you got the problem resolved.