Or just go to your local AutoZone and have them scan it for you .

be glad you don't have those blasted CVT transmissions.  They have low fluid capacity so the fluid gets dirty much quicker and degrades quicker thus needs maintenance more often and fails quicker.

The poorest CVTs are those made by Nissan. quite unreliable. My parents had previously owned an Altima. After 4-5 months of ownership the CVT tranny was done for.

I've heard of some issues with their transmissions. The 4-speed automatic that was used when they were operating with Ford wasn't great, and neither is the 5-speed. Even their own 6-speed still made today isn't great. The transmission and the rear end both failed on my uncle's 2017 CX-5. The car was maintained religiously...

That's my take on Mazda.

I think Mazda is a fair brand. Their interiors are extremely stunning in their most recent car models however powertrains aren't the best.

I've had a few long trips with the Mazda 3 so far, another one planned this weekend as of now. The check engine light went away a while ago.
The car had a bad battery when I first bought it, and the dealer replaced the battery. I think this may have something to do with it, but I'm
not quite sure... the engine light had been off with each road trip.
As I've said before though, the Mazda 3, at least mine in particular, is NOT fast. At all. I didn't buy this vehicle for speed, so I'm still
satisfied with it... but there have been times where faster acceleration was needed. Especially on the highway.

"The check engine light went away a while ago"

Usually cars are programmed so the DTC goes away if the cause is confirmed as not present for certain number of starts. Here it could have been related to the weak battery.
What I'm wondering is, why the dealer did not go through the codes and cleared them out when replacing the battery?
Plus if it would be one of the newer cars, the car would actually kill the new battery pretty quick when the battery management was not reset properly. There it is far more complex than just maintaining the stable 13.5 or so Volts. It varies the charging voltage so to reduce the battery aging when still rather fresh, but then drive it more aggressively. It is about a dilemma between sulfation vs corrosion, which affects the residual life more. With a new battery there is no sulfation to treat, so corrosion has the bigger impact on the residual life, so it really does not overcharge it at all. But when old battery has developed a more extensive sulfation, attempting to eliminate it makes it to keep working longer even with the causes extra corrosion the repeated overcharging causes. When a new battery is installed and ECU (which is commanding the alternator what voltage to regulate) not reset, it keep "desulfating" when the new battery does not need it, killing it by the excessive corrosion in the process.

All cars with "stop start" have such system for sure, but many decade older cars had that too - as when set and working correctly, it almost doubles the useful battery life in the car (10 years battery life on a daily driver is quite common when it is not stop-start; otherwise with a fixed voltage alternator it used to be no more than 6..7 years).

Just recently traded for a Subaru Crosstrek. I previously had a Legacy but wanted a little more room and the option to be able to tow my jet ski or a small trailer without having to borrow someone’s truck. It’s the perfect size for me and gets fantastic gas mileage. Also has plenty of room to haul lots of lights around! 

Volvo V60 Cross country with the "drive E" engine
cars good that start stop is some annoying

I drive a 68 Pontiac ambulance. It is orange, green, and white, getting an impressive 8.3 MPG. It has 26 total exterior lights.

Now THAT we have to see. 

I really need to see this as well, it's the smiles per gallon that really count. Stuff a 455 Pontiac and a (reproduction) GTO grill on it to really give it that sporty feel.

Had a 71 Buick Riviera with the 455 V-8 and it was magnificent.  A luxurious Battleship. 

Looked like this

Awesome! I had a '72 Boat Tail Riviera several years ago.
Right now, I'm still driving the 1960 Plymouth Belvedere seen here:
https://www.lighting-gallery.net/gallery/displayimage.php?pos=-25773
and here:
https://www.lighting-gallery.net/gallery/displayimage.php?pos=-29187
It has a Slant Six and 'three on the tree' if anybody still knows what that means. LOL

Those are some sweet rides. What happened though?? Why not keep the Riviera?
Hopefully someday I can get my hands on one vintage car... 60's, 70's or 80's era.
I've been in a few modern sport cars and a few modern muscle cars, but I've never been in a 60's, 70's or 80's muscle cars yet.

I had that Riviera back when I was flipping vintage cars for income. There were many I wish I could have kept.
I do like tail fins and with regular gas at $5 a gallon in San Diego, I'm very happy with the gutless Belvedere!
I do still have this 1961 Imperial:
https://www.lighting-gallery.net/gallery/displayimage.php?pos=-149915
but haven't driven it for awhile.

$5 a gallon, lucky you..! If we had one of those big gas guzzlers, we wouldn't be able to afford to fill it up