Good to know about the coolant leak warranty!
Ugh...and why does it NEED an electronic T stat??
I need to get an OBD reader. I highly suspect my Mazda dealership knew the engine was not coming up to temp the first time I mentioned it to them, but blew me off as an ignorant car owner. If I would have had the data to back up my claim, it would have been a different story. And what were the effects of running the car several months w/o it coming up to temp, esp during those cold winter months. Hopefully none.
I've used cheap OBD2 scanners. They last about 3 to 6 months and when I need it, it doesn't work.
That is very common issue on the NA only. Recently All NA engines from 2018- now have extended warranty (15 years/150k miles) for the T-stat + Mazda issued a special service campaign before it could become a recall. Dealers are more aware today vs 1 year ago.
Good info to know. Hopefully, I’ll not need another T-stat, but if I do…
When Mazda added cylinder deactivation to the 2.5L NA in MY 2018 CX-5, the “coolant control valve” was introduced to replace the traditional thermostat. I thought it was an electrical thermostat like Toyota uses on its Dynamic Force 2.0L/2.5L NA. Turned out It still uses a traditional mechanical “fail-safe thermostat” inside but we have to get the whole coolant control valve if the thermostat fails.
Actually, there are two listed intervals. 7500 is the standard and 5k is for heavy duty. I do 5k just for peace of mind (of course the dealer sets the interval at 5k - my oil service display starts at 5k and counts down- as they want more service business). I am sure 7500 would work just as well if one was comfortable with it. I don't know of any long term tests which would prove one interval was better than the other. With the synthetic oil used today, intervals have gotten longer from some manufacturers (10-15k in some cases).
My point is, back in 2018 when I was planning to get a new 2018 CX-5 and immediately dropped the plan once I learned Mazda had added cylinder deactivation to a reliable 2.5L NA, why Mazda spent that much effort and money to a feature which is historically having the bad reputation of failure, and gained 0 ~ 1 EPA fuel consumption ratings on an already efficient 4-cylinder engine? Looking back, almost EVERY component Mazda modified to accommodate cylindef deactivation has problems! Rocker arms / switchable hydraulic lift adjusters、cylinder head、transmission / torque converter、now the coolant control valve. It’s an indication of lack of good design and quality when Mazda engineers are redesigning something or doing the modification on parts. IMO Mazda’s R&D department seems to have some major problems.
Wow, didn't know these tools have become so inexpensive now. Decade ago I used to have a BMW E46 M3. The wired code reader costed me $400 and required decoding by reading from a paper manual. How times have changed for the better
Ugh, should be under warranty at least.After a couple weeks of my '22 w/ CD being very slow to warm up to a normal temperature, today the Check Engine Light came on. Sure enough, it is code P0126 so I will get contacting the dealer to get this fixed.
Yep, it's part of the powertrain warranty, of which I have plenty left.
Yes this’s a common problem for the 2.5L NA with CD. I believe you can post this problem under the proper thread here:After a couple weeks of my '22 w/ CD being very slow to warm up to a normal temperature, today the Check Engine Light came on. Sure enough, it is code P0126 so I will be contacting the dealer to get this fixed.
In earlier days people were having this problem and been told by MNAO this expensive coolant control valve is NOT a normal mechanical thermostat hence it isn’t covered under powertrain warranty. See the thread posted above.
