What kind of Jeep?
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.
SOURCE: 98 Plymouth breeze trouble codes
P0700 - Transmission Control System Malfunction.
P1391 - Intermittent Loss of CMP (Camshaft) or CKP (Cranckshaft).
P0725 - Engine Speed input Circuit Malfunction.
P1595 - Speed Control Solenoid Circuit Open Or Shorted
P0320 - Ignition Engine Speed Input Circuit Malfunction
I suggtes take off each sensor and test resistance in everyone (check this measure in the Service Manual), if they are out range,m just replace it.
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