Question about 2002 Jeep Liberty
What abut p0320
Does car run (gee, kinda important that) or misfires/?
what do you want to know, the full FSM statement on said number.
you can buy the book or login to alldata.com and read.
which engine, can very by , ENGINE
roll dice, 3.7L
No Crank Reference Signal to PCM
Number of Trips to Set Code: 1
Engine cranking, vacuum signals present; and the PCM detected from 3-8 CMP Sensor signals without detecting a CKP Sensor signal.
The cars computers is not AI, it just s dumb computer and techs,
do the tests to find out the truth.
the cable is loose to CKP is #1
CKP are a rear failure.
what i do see if the CKP is dead. or just misfiring.
if dead i check the CKP signals by HAND. (i use a scope in all cases)
if its dead, its dead.
if not i check the wiring for DAMAGE end to end.
if the CKP is good to PCM , the PCM is bad.
the error means really
on most cars.
the CKP sends pulses for TDC,
and if 1 in 10 are missing it sets this DTC.
if all are missing , that too , sets this DTC, and engine dont run.
that is why I asked you the runs question. and misifiing....
not the PCM sees the cam spin and pulse but the crank signal is wrong or dead.
The crank sensor tells TDC
the cam sensor shows, which cylinder it is on. for spark and injection timing.
together they work as team. so the PCM can create spark and fuel
at the correct time, (exactly)
Posted on Jun 03, 2014
On Jeeps/Dodge/Chrystler Code P0320 indicates a problem with the Crankshaft Positioning Sensor.
This sensor tells the computer when the crankshaft is at Top-Dead-Center. If this sensor goes bad the computer does not know when to do anything. It all has to do with the timing of everything that makes the engine work.
The problem could be with the sensor itself.
Or the connector that plugs into the sensor.
Or the wires going to the connector.
Most likely it is the sensor itself.
On the Jeep Liberty the sensor is found underneath the passenger side just forward and above the oil pan. Make sure your engine is cool before you try to reach the sensor by hand because the exhaust so close. Look at the wires to make sure that they do not appear to be broken or shorted to the frame or something. Unplug the connector ans inspect it for corrosion or anything that might prevent good electrical contact. You can get a replacement Crankshaft Position Sensor from just about any auto parts store. It is a simple matter of unbolting the old sensor and bolting the new one back in. The BIG problem with this job is physically getting to the sensor and getting a socket to the bolt. Other than that it is a very simple procedure.
I have changed them without lifting the vehicle. If you do decide to lift your vehicle BE SURE TO USE JACK STANDS!!!
There are plenty of YouTube videos that show you how to do this.
Posted on Jun 03, 2014
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Posted on Jan 02, 2017
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