1, 2, 3, 4!
Rev up your engines!
[REVVING ENGINE]
[PEELS OUT]
[TIRE SKIDS]
It's time for ScottyKilmer.com.
Today I'm going to show how to change a crankshaft position
sensor in an engine.
But how do you know if you need a crankshaft position sensor?
Well, here's how.
In this case, the Check Engine light is on in this jeep.
So I'll get my scan tool and hook it up to see what's wrong.
In this Jeep, the scan tool plugs right under the dash.
And then the scan tool gives a code.
In this case, it's P1391 for Cam/Crankshaft Signal Loss.
So we'll go under the hood to find the camshaft position
sensor.
But where is it?
Well, in the case of the Jeep, it's next to the oil filter,
right here.
There's the sensor.
To remove it, you just unplug the sensor wire.
Then get a tiny wrench and take the two bolts off.
Then just pull the sensor straight off.
Then, of course, you need to buy a new sensor.
And here it is.
Then get the sensor and put it back in the same direction
that it was pointed.
You can only put it on the right way, or 180 degrees off.
So make sure it's pointed in the same direction
as it was when you took it off.
Then be sure to tighten the two bolts snug, so it doesn't slip.
And of course, don't forget to plug it back in until it snaps.
Now crankshaft position sensors play an important role
in your car.
They tell the computer where the crankshaft is spinning
so it knows how to fire the injectors
and how to fire the ignition system.
And before you go for a road test, get the scan tool
and reset it so the light goes on.
To reset the computer, just turn the key to the On position.
Don't start it.
Just leave it in the On position.
[BEEPING]
Then select Erase Codes and Yes.
Now it's erasing the codes, and they're all erased.
[STARTS ENGINE]
The Check Engine light has gone off.
So now you know how to change a crankshaft position sensor.
And remember, if you have any car questions, just
visit ScottyKilmer.com.
[REVS ENGINE]
[PEELS OUT]
[MUSIC PLAYING]