In this video, we're gonna be going over the top problems on the 7th generation Nissan
Sentra.
There's nothing wrong with this vehicle, there's nothing wrong with owning it or buying one.
Every vehicle has problems, we're just going over the problems that we have found.
Number one, mass airflow sensor codes.
You might get a check engine light, you scan it, you get a check engine light code for
a mass airflow sensor.
Mass airflow sensor is located right here.
Now, just because you have a code for this sensor doesn't always mean that that's the
problem.
You definitely wanna check the connector, wiggle the connector, pull that off.
Just make sure the terminals look okay, it's kinda hard to see but you don't wanna see
any green in there or in there.
They visually look okay.
And also the wiring, see if the wiring is good.
Everything looks good here.
To take this sensor out, you can use a 7 millimeter socket or even a Phillips head screwdriver.
Don't drop the bolts.
And you can grab that sensor and just slide it straight up, and there it is, there's the
old sensor.
Now, you can replace this sensor, sometimes you can clean it, they actually make special
cleaner for mass airflow sensors.
And air goes in there and it goes past a little sensor just like that.
Reinstall it, just slide it in place, put the screws back in and reconnect the connector,
lock it in place.
So, it's important that there's no debris on the actual mass airflow sensor.
You wanna make sure you change your air filter regularly.
If it's excessively dirty, that can cause some problems with that.
Also, clean your throttle body, that can cause some issues.
The PCV system, if that's plugged up or not doing its job properly, that could cause a
mass airflow sensor code.
Also, there is a PCM update which you're not gonna be able to do from home, you're gonna
have to bring it to the dealer and have them reflash the PCM.
Number two, the CVT transmission.
A lot of times, there's some problems with these, you'll be going down the road and the
vehicle will just stall on you, or when you go to drive or reverse, the vehicle won't
even move, you'll hear a noise coming from the transmission itself, there's not much
you can do, you can have it rebuilt or you can go get it replaced, that's as much you
can really do.
It's a good idea to always have the fluid changed on a regular basis, you can drain
the fluid there and top it off up top.
You could always end up with a transmission speed sensor code, there is multiple speed
sensors that are replaceable, there's one in the front up here, there's a sensor right
there, there's another sensor right here, and there's another speed sensor on top here.
So, make sure all your wiring and connectors are good and make sure your fluid is up to
par.
Number three, front struts.
A lot of times these struts go bad, you're gonna get either a banging noise or you'll
see some fluid coming out of here.
Going over bumps, the front of the vehicle may go up and down, it might be like riding
in a boat.
So, that's a pretty good problem.
Sometimes the upper strut mounts make noise and stuff when turning back and forth, so.
It's a pretty easy job, not too difficult, we sell these full assemblies, and just pull
the wheel off, take the sway bar link off, take the bolts out, take the upper strut mount
bolts out, reinstall the same way you took it out.
Number four, ABS codes with a wheel speed sensor code.
You may have a problem with one of the wheel speed sensors, I guess the right rear is the
most common for the failure, but the wheel speed sensor wire is right here.
You can look at the wire, make sure it's not cut at all.
Check right here, pull that out.
Take this 10 millimeter bolt out right here and then you slide the sensor right out and
disconnect it over here, right here on the frame of the vehicle right next to the gas
tank.
Now, if you have a scan tool that can scan ABS conditions, what you can do is turn the
wheel while the wheel's up in the air and see if you can monitor the speed going up
or down.
You can also swap these sensors side-to-side, it's kind of a lot of work to do, but that
would tell you if the sensor is bad, check that.
Also, always check your connections and your wiring.
Number five, the ignition coils which they're located under here, grab this cover, pull
it up, it may be kinda tricky to pull up in the back.
Slide it right up, there's some tabs right there and there.
Coils are located right here.
To replace them, just disconnect the connector right here, take that 10 millimeter bolt out,
slide the coil right out, put the new one in, you're good to go.
It's always good to replace the spark plug when you're doing the coils anyway.
If you're getting in there, just put new plugs in it.
One of the symptoms you're gonna get when you have bad coils, your engine's gonna run
rough, it'll shake a lot and you'll end up with a misfire, you may even end up with a
check engine light or the P300, or even any flashing check engine light.
So, if you need to replace those coils, it's not that hard of a job.
You're good to go.
So, there's some of the problems that we have found with this Nissan Sentra 7th generation.
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