Question about 2003 Jeep Liberty

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Engine code p0320 and p0725 - 2003 Jeep Liberty

Posted by Anonymous on

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6ya6ya
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Posted on Jan 02, 2017

  • 1757 Answers

SOURCE: P0320 & P1391 OBD codes displayed.

P 0320 = No Crank Reference Signal to PCM. No Crank (shaft position) reference signal detected during engine cranking (starting).
P 1391 =Intermittent Loss of either Camshaft Position Sensor or Crankshaft Position Sensor.
Hav you attemtped the "3-Key-Ons" method to see these codes on your digital Odometer (assuming you have one) Turn the Key from Off to On (not start) three (3) times. On the third (3rd) time leave the Key in the "On" position (not start). Look at your Dogotal Odometer (if so equipped). The Codes, one at a time should appear. The Last Code will be "P donE".
If te engine is performing without problems: disconnect the negative side of the Battery and wait at least 5 to 30 minutes. Reconnect the Battery. Re-preform the 3-Key-On's and see if and Codes are now showing.
If you start having Start or Running problems becoming more and more frequent: consider replacing the Crankshaft Position Sensor. If this sensor "fails" you may not get any fire to anything, as this is the signal that is necessary for the PCM to initiate the Firing Sequence. The PCM will not send a signal to even the Ignition Coil to begin.

Posted on Jan 08, 2010

skychief2001
  • 21873 Answers

SOURCE: engine light on with code P0725

P0725 JEEP Description The Engine Control Module (ECM) monitors the engine speed through the Crankshaft Position (CKP) sensor with the engine running, and send signal to the Transmission Control Module (TCM).
The code is set when the TCM does not get an engine speed signal from the ECM.
Could be a problem with either computer, the link between the two, or the crank sensor.

Read more: http://engine-codes.com/p0725_jeep.html#ixzz21kbHJXdi

Posted on Jul 26, 2012

Testimonial: "Thanks for you help Stephen. We took it to the dealership today and they are saying it is the PCM Powertran Control Module. How hard would this be to replace ourself. The cost to repair at dealership is almost 1500.00. We have been reading on replacing but some say it has to be flashed and the VIN # put in by the dealer in order for it to run. Is this correct? Is there no way to do this except by dealer? Thanks again for all you help in this matter. :)"

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