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- 2021 CX-9 Sig
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- 2021 CX-5 GT
Your link does not work but you can easily search Mazda CX-5 on the site. I will say that the "issues" on that site read as if written by a group of 75 year old homeless men.
Yikes, really sorry to hear of your problem OP. As someone who regularly pushes high RPM's accelerating, or going into manual mode (I don't have a sport mode in my 2014), this limp mode sounds downright dangerous and scary, and quite frankly I'm not sure I'd want the car anymore if it kept doing that. I hope wherever this leads and whatever you decide, that Mazda ends up making it right.
So, just reading the posts, I will admit I don't fully understand what all these parts are. Is it safe for me to say the cause seems to be this rocker arm (I'm sorry I don't know what that is) is falling off, and the the CD screws with the oil pressure and creates the perfect environment for when you push to high RPMs, it goes into limp mode? Sounds like CD in and of itself while contributing to this happening, isn't the actual root cause. The faulty arm and/or design allowing it to fall off to begin with is. So while Yrwei is quick to call this a CD issue, would it be possible for this to happen without the CD? Does the CD just end up creating the right environment for this to happen? I guess what I am getting at is if a 2.5L SkyActiv NA without the CD (Gen 1s, and 2017's) also had this rocker arm fall off, would they never know? Seems odd.
Ah....that makes sense. Thanks for the clarification.The cause of the rocker arm falling off is low oil pressure on the lifter during cylinder deactivation. This is due to the wrong programming in the PCM. My dealership told me that they were informed by Mazda that they had two suppliers of this PCM and one of the suppliers had the wrong program on theirs. If you have a 2106 CX-5 you do not have cylinder deactivation and I would say you have nothing to worry about.
The rocker arm falling off is in Mazda Service Alert No: SA-15/19 Issued 04/08/2019
https://static.nhtsa.gov/odi/tsbs/2019/MC-10159203-0001.pdf
The rocker arm falling off is in Mazda Service Alert No: SA-15/19 Issued 04/08/2019
https://static.nhtsa.gov/odi/tsbs/2019/MC-10159203-0001.pdf
Here is my Service report from them changing my engine
Your repair invoice should silent those doubters right there. The service alert document from NHTSA should further prove there's a major issue on Mazda's cylinder deactivation system. I'm glad my hunch was correct and changed my mind getting a new 2018 CX-5 purely because Mazda suddenly added this problematic cylinder deactivation feature to its NA 2.5L starting MY 2018!hopefully you guys can open that so all of you doubters out there will understand this is not a joke. I sincerely hope none of you have to experience this. I can't emphasize enough how important this is. You may be driving around with this problem as we speak. the only way you will know is if you get the RPMs high enough and maintain them for a bit. If the rocker is off your car will go into limp mode. They will need to reflash your PCM to the correct logic and obviously address your engine issue.
Thank you to all of you out there who have been believing me and backing me up.
Here is my Service report from them changing my engine
The rocker arm falling off is in Mazda Service Alert No: SA-15/19 Issued 04/08/2019
https://static.nhtsa.gov/odi/tsbs/2019/MC-10159203-0001.pdf
I now believe you now, thanks for that image. I agree, it should be a recall for all models with the faulty CD/PCM setting. And if they can't identify the ones with the bad PCM setting then all of them need to be recalled.
MyFirstMazda I am glad you believe me now. Thank you.
Your repair invoice should silent those doubters right there. The service alert document from NHTSA should further prove there's a major issue on Mazda's cylinder deactivation system. I'm glad my hunch was correct and changed my mind getting a new 2018 CX-5 purely because Mazda suddenly added this problematic cylinder deactivation feature to its NA 2.5L starting MY 2018!
Can't Mazda disable CD to resolve this issue? I rather trade a couple MPG for peace of mind.
Was looking at the Honda thread about their variable cylinder management system and people disabled it https://www.odyclub.com/forums/52-2005-2010-odyssey/268778-vcmuzzler-ii-disabling-vcm-faq-s.html