In this video, we're going to be going over the top five problems of his third-generation
Jeep Grand Cherokee Laredo.
Now, there's nothing wrong with this vehicle.
There's nothing wrong with buying one or owning one.
Every car has their problems.
These are just the top five that we have found.
Number one, the throttle body.
Now, the throttle body is located right here on the top of the engine.
Now, what the throttle body actually does is it opens and closes.
It's almost like a valve, and there's a flap in there.
As it opens, it allows more air to get into the engine.
Now, whenever you step on the accelerator pedal, that's when it opens.
When you let off, that's when it closes.
Some of the symptoms you may find is the vehicle may stall out, or you could have an extremely
rough idle.
And you can also have a check engine light with the code P0122.
Now, if you just have the driveability issues, you could potentially try to clean the throttle
body.
It may not solve your problem.
You might be better off just replacing it.
If you have the check engine light with the code, chances are you just need to replace
the throttle body assembly and check that connector.
If the connector's loose, that could cause the issue also.
Number two, the ignition switch.
Now, we all know the functions of the ignition switch.
You have accessories, you have on, and it starts your vehicle and keeps your vehicle
running.
Now, you may notice some of the symptoms.
When the vehicle is running, a lot of the dash lights are flickering or some other weird
electrical problems.
And you can also use a higher-end scan tool and scan the different modules in the vehicle.
And you may find a code C140F in one of the modules.
Whether it's a BCM, body control module, or a comfort module, or something to that effect.
Now to fix that, you're gonna have to replace the ignition switch.
Not the ignition cylinder but the switch itself.
Number three, the fuel pump.
Now, it's located in the fuel tank itself and it pressurizes the fuel, and sends it
up the lines, up to the engine.
One of the symptoms you may notice is when you go to start the vehicle, it will crank.
The engine will be turning over, but it won't start.
Now, if you're stuck somewhere, one of the things you might be able to try is have someone
crank the engine and take a hammer or a rubber mallet and try to hit on the gas tank.
That might loosen up the starter so that you might actually get some pressure and the vehicle
starts.
Now, it's only a temporary fix.
That's just gonna get you home.
It's not gonna fix the problem.
You gotta replace the pump.
Now, to replace the fuel pump, you are gonna need to support the fuel tank and lower the
full talk down.
It's always a good idea to drain most of the fuel out when you're doing that.
Replace the pump on the top of the tank, and then reinstall it.
In some vehicles, there's actually an access from inside the cab.
Where you can take off a plate and access the fuel pump.
But most of the time, you just have to stop the tank.
Number four, the starter motor.
The starter motor is located right here on the side of the engine, about halfway up the
engine on the driver's side.
Now, one of the symptoms you're gonna find is the vehicle does not start.
Now, opposite of the fuel pump where you had a cranking no start, this is just gonna be
a click or nothing at all when you go turn the key.
Now, you always want to check your battery condition.
You always want to check the cables as well and the connections.
But if you're in a jam, and you have a small hammer, and you can access the motor, what
you can do is have someone cranking the engine and give the starter a tap.
If it starts right up, then you know that's the problem and it'll get you home at least.
It's only a temporary fix.
To replace it, you are gonna have to take this panel down.
Make sure you disconnect the battery.
You can disconnect the bolts on the starter.
Take it out.
Put the new one in.
You should be good to go.
Number five, the thermostat.
Now, the thermostat on this engine is located right here, down below on the passenger side.
This is the 3.7-liter engine.
If you have a different engine, it may be in a different location.
Now, what the thermostat actually does is it's gonna control the flow of coolant to
the engine.
It allows the engine to warm up to operating temperature.
And then, it opens, allowing more coolant to go through the engine to keep it cool.
But if the thermostat is in the stuck open position, too much coolant is gonna go through
the engine and it's never gonna get up to operating temperature.
And on the other hand, if the thermostat is closed, then the engine's gonna get too hot
and overheat.
You might even get a check engine light with a code P2181.
The only thing you can do is replace it.
There's nothing you can do to fix just the thermostat itself.
You can't clean it.
So, replace the thermostat.
And if you have the chance, replace that housing as well.
It's a plastic housing.
Over time, the plastic's gonna break down and it's gonna leak.
How you're gonna replace it is you want to drain the coolant.
You want to make sure the engine's not hot when you're draining the coolant.
And you can take this hose off.
There's a hose clamp and then there's two bolts that hold that on.
Take that off.
Clean up the surfaces.
Put the new one in.
Put it together.
Put the coolant in, and you're good to go.
So there's the top five problems that we have found with this Jeep Grand Cherokee Laredo.
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