In this video, we're gonna be going over the top five problems that we have found on this
11th generation Toyota Corolla.
Just to let you know, there's nothing wrong with this vehicle, there's nothing wrong with
owning one or buying one.
Every vehicle has their problems, these are just the top five that we have found with
this vehicle.
Let's get into it.
Number one, mass airflow sensor problems.
Some things you always want to check is you always want to check the wiring, make sure
the wiring's good.
If you have a scan tool while you're watching the mass airflow readings, if you wiggle some
of the wires, it could indicate a bad connector or bad wire.
Also, always check the air filter.
If the air filter is extremely dirty, that can cause some mass airflow issues as well.
This one's pretty dirty, this one needs to be replaced.
And the snorkel also, all these clamps need to be tight.
If any of these are loose, those can give you a problem, any of these hoses, so make
sure all that stuff is in good order.
So you may have a check engine light with a mass airflow sensor code or a rich or lean
code.
Most of the time it's the actual mass airflow sensor which is the problem.
It's really easy to change, just push down on the button right here, disconnect the connector,
just like that.
Take a Phillips head screwdriver and just grab the mass airflow sensor and take it out.
Now, a lot of times you'll read stuff where it says you can clean these.
In this Toyota, it's really not a good idea.
If you have that problem, you should just replace it.
Some of the other things you may notice, if you have a mass airflow sensor problem, your
fuel economy could be affected, the transmission shifting could be affected, and the drivability,
the throttle response could be affected as well.
Number two, EVAP system codes and not being able to clear the permanent codes.
The first thing whenever you have an EVAP system code, unless it's a circuit code is
you want to check the gas cap.
Just grab the gas cap, give it a wiggle, make sure it's not loose.
If it was loose, tighten it up, clear the code and drive it.
Pull the gas cap off, take a look at it, make sure it doesn't have any cracking on it.
Or check the filler neck, see if any of this is cracked or rusted or anything.
If any of that is your situation, you're gonna have to address that.
Replace that and clear the codes.
Now you could always have another problem with your EVAP system, whether it's the fuel
tank or the vent or the purge solenoid, but the most common is the gas cap.
And part of the problem with resetting it, you get a permanent code.
Everyone worries about this permanent code.
What you need to do is drive the vehicle.
It needs to go through multiple drive cycles to get rid of that code on its own.
Number three, fuel issues caused by bad gas.
A lot of times you'll have a drivability issue where the engine runs rough or the vehicle
will start up and then just shut down.
A lot of that is caused by the fuel injectors and sometimes they get gummed up.
Fuel injectors are located right here.
A lot of times if you use gas from a no name brand gas station, a non reputable gas station,
the gas isn't up to par.
It's not gonna do the job, not necessarily the octane, you still use the octane that's
meant for the vehicle, but the gas just isn't as clean as a more reputable gas station and
it's gonna cause the injectors to gum up.
So this is the injector rail, injectors are down here.
To fix this problem, you're going to have to get rid of that bad gas, do a professional
grade fuel injection cleaning.
You may need a special tool to hook it up.
That'll clean off the valves and clean the fuel injection system, and then you should
be good to go.
Number four, engine and transmission mounts.
So you have a mount that's located right here.
There's a rubber bushing in the middle right there.
That rubber bushing will disintegrate over time and just cause a noise when you're shifting
gears or shifting from drive to reverse or park to reverse.
Also right here, there's another mount in the front of the engine.
That's rubber underneath there.
That'll disintegrate.
The other mount's right here in the back, right in front of the exhaust, right behind
the axle.
And there's another mount right under here attaching to the top of the transmission underneath
the airbox.
Some of the symptoms you're gonna find when you have bad mounts are when you shift into
reverse, you may feel a extreme thud and same with drive.
Sometimes checking this with your foot on the brake and just accelerating the gas pedal
a little bit while you have a friend looking at the engine to see if it's rocking, that's
a good way to tell if the mounts are bad.
So you may find that when you go to accelerate from a stop, you feel like a thud.
Also, you could feel like a chattering sensation as you're accelerating.
And sometimes you feel a lot of vibration throughout the vehicle when the mounts are
bad.
When the vehicle is in gear and you're sitting accelerating, you may feel some vibrations
in the steering wheel or the whole vehicle just tends to vibrate a little bit more than
normal.
And number five, the CVT transmission problems.
These transmissions are different than regular conventional automatic transmission.
They don't have gears.
It's a variable transmission so when you're driving it along, the RPMs are going to do
weird things, it's not going to shift on you.
That being said, it's important to change the fluid regularly.
So you want to stick with whatever your owner's manual says and change the fluid regularly.
The transmission pan is located right here.
This is one of the plugs.
If you pull this plug out right off the bat, you're only going to get a little bit of fluid
out of there.
There is a flute that goes up there or a plastic tube that you have to take that out as well
to drain the rest of the fluid.
When you drain the rest of the fluid out, if you ever see any metal in the fluid, then
there's internal damage in the transmission.
and most likely you're gonna need to replace the transmission.
If you have any transmission drivability issues, a fluid change probably isn't going to fix
it.
You're going to want to bring it to a professional.
If there's any types of codes, there's probably something internal wrong with it and you're
not going to be able to fix that just with a fluid change.
So those are our top five problems that we've found with this car.
If you have any of those problems or other problems, please leave us a comment below.
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