MrViking
2022 CX5 Premium
I had my 2022 CX-5 Premium repaired on 1/31/26 under the extended warranty defined by TSB 01-001/26. One of the things they do is to update the PCM with the latest software. My PCM version was/is PX2G-188K2-K. This revision lets the PCM know that my CCV no longer has the fail-safe thermostat in it, but the dummy plug. Cooling is now managed entirely by the fans and the Active Grill Shutters (AGS). For those who may not know, like me until after this repair, the CX-5 has shutters that cover the lower part of the radiator that open and close as part of the cooling system.
It's been cold here (for SE Virginia anyway) and I noticed that with temps in the mid-20s, the coolant temp had pretty significant swings between about 182° and 204° F. This is apparently the result of the "K" software rev. where the AGS don't open and close properly to maintain a consistent temp when it's cold. They open for too long and then close for too long. The same thing didn't happen when the temps were in the 50s. The coolant temp was a solid 195°-197°. Some research revealed that there are a couple more PCM updates. Namely revs L and M. M specifically addresses the AGS duty cycle. It changed from "open based on engine load" to "closed until 205° F" when ambient temps are below 32° F. Seems like this is exactly the fix I needed.
I took the car back to the dealer and asked them to check on it and after checking it, told me that it had the latest rev of the PCM software, which was the "K" rev. I'm pretty sure that they are not lying to me and when they connect the car and check for the update, it's telling them that no updates are available.
My question: Does anyone here who has had the CCV fixed with the dummy plug have a PCM rev later than "K"? An OBDII scanner would show the CID as PYUB012 or higher if the updated software is installed. My CID is PYUB011. Apparently the 011, 012 or 013 translates the K, L or M code letter on the PMC since 11=K, 12=L and 13=M
My wife, who has the identical year and model as mine, has the same CID as I do and it has not been updated so it's left me a bit confused. I'm told by AI that PYUB011 is the original code and has not been updated. It also told me that the PCM has to be updated a specific way for the connected car to know the update is out there. How? I have no idea but that's the beauty of AI, ain't it?
Every dealer's nightmare is a customer with and ODBII reader and the internet.
Thanks,
Tim
It's been cold here (for SE Virginia anyway) and I noticed that with temps in the mid-20s, the coolant temp had pretty significant swings between about 182° and 204° F. This is apparently the result of the "K" software rev. where the AGS don't open and close properly to maintain a consistent temp when it's cold. They open for too long and then close for too long. The same thing didn't happen when the temps were in the 50s. The coolant temp was a solid 195°-197°. Some research revealed that there are a couple more PCM updates. Namely revs L and M. M specifically addresses the AGS duty cycle. It changed from "open based on engine load" to "closed until 205° F" when ambient temps are below 32° F. Seems like this is exactly the fix I needed.
I took the car back to the dealer and asked them to check on it and after checking it, told me that it had the latest rev of the PCM software, which was the "K" rev. I'm pretty sure that they are not lying to me and when they connect the car and check for the update, it's telling them that no updates are available.
My question: Does anyone here who has had the CCV fixed with the dummy plug have a PCM rev later than "K"? An OBDII scanner would show the CID as PYUB012 or higher if the updated software is installed. My CID is PYUB011. Apparently the 011, 012 or 013 translates the K, L or M code letter on the PMC since 11=K, 12=L and 13=M
My wife, who has the identical year and model as mine, has the same CID as I do and it has not been updated so it's left me a bit confused. I'm told by AI that PYUB011 is the original code and has not been updated. It also told me that the PCM has to be updated a specific way for the connected car to know the update is out there. How? I have no idea but that's the beauty of AI, ain't it?
Every dealer's nightmare is a customer with and ODBII reader and the internet.
Thanks,
Tim
Last edited:
