Where is the wiring connector that feeds the crank position sensor

crank shaft or
ckp crank shaft sensor. CKP
broke the connector?

fxhfddj

Your spark plug wires go to coils, coils sit on top of ignition module.You have two crank sensors, if crank sensor issue, check the 7x crank sensor, on back side of engine block, down low, two wire connector, wire colors, yellow and purple.

CRANKSHAFT POSITION SENSOR - 2.5L

REMOVAL

1. Remove speed control servo from driver's side strut tower.
2. Remove crankshaft position sensor retaining bolt Crankshaft Position Sensor
3. Pull crankshaft position sensor straight up out of the transaxle housing.
4. (Disconnect crankshaft position sensor electrical connector from the wiring harness connector.

INSTALLATION - ADJUSTABLE All vehicles will be equipped with an adjustable crankshaft position sensor. This can be identified by an elongated mounting hole in the sensor.
NOTE: If the removed sensor is to be reinstalled, clean off the old spacer on the sensor face. A NEW SPACER must be attached to the sensor face before installation. If the sensor is being replaced, confirm that the paper spacer is attached to the face of the new sensor Crankshaft Position Sensor and Spacer

1. Install sensor in transaxle and push sensor down until contact is made with the drive plate. While holding the sensor in this position, install and tighten the retaining bolt to 12 N·m (105 in. lbs.) torque.
2. Connect crankshaft position sensor electrical connector to the wiring harness connector.
3. Attach connector to heater tube bracket.
4. Install speed control servo. Tighten nuts to 9 N·m (80 in. lbs.) torque.

Sends a signal related to the rail pressure as a voltage to the ECM. 3 wire connector :

• Red : 5V (Feeds from ECM connector J1-4) Shared with MAP sensor, EGR pressure sensor and accellerator position sensor.(compare values from these sensors and ECM connector)
  
• Black : Ground (Feeds from ECM J2-22) Shared with the same sensors mentioned above
• White : Signal feeds to ECM connector J2-22

Low pressure will set P1194 error code. Oil rail pressure should be more than 3MPa when cranking

Also check Engine coolant temp sensor and wiring. Engine coolant to manifold temp should not differ by more than 5 deg C either way after 8 hours of no operation. I have found the same symptom on these diesels with fuel supply problems. Operate the priming pump (on top of the fuel filter) until it becomes diffycult to push down before starting or checking anything else.

well replace lots of coils but same with crank sensor on these trucks

• For this test, an analog (non-digital) voltmeter is needed. Do not remove the distributor connector from the distributor. To perform a complete test of the Camshaft Position Sensor and its circuitry, refer to the DRB II diagnostic tester. Also see the appropriate Diagnostic Charts. To test the sensor only, refer to the following: See: Testing and Inspection
• Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Be sure that the connector is not damaged when inserting the paper clips. Attach voltmeter leads to these paper clips.

PROCEDURE

1. Connect the positive (+) voltmeter lead into the sensor output wire. This is done at the distributor wire harness connector.
2. Connect the negative (-) voltmeter lead into the ground wire.
3. Set the voltmeter to the 15 Volt DC scale.
4. Remove distributor cap from distributor (two screws). Rotate (crank) the engine until the distributor rotor is pointed towards the rear of vehicle. The movable pulse ring should now be within the sensor pickup.
5. Turn ignition key to ON position. Voltmeter should read approximately 5.0 volts .
6. If voltage is not present, check the voltmeter leads for a good connection.
7. If voltage is still not present, check for voltage at the supply wire.
8. If voltage is not present at supply wire, check for voltage at pin-7 of Powertrain Control Module (PCM) 60-way connector. Leave the PCM connector connected for this test.
9. If voltage is still not present, perform vehicle test using the DRB II diagnostic scan tool.
10. If voltage is present at pin-7, but not at the supply wire:

1. Check continuity between the supply wire. This is checked between the distributor connector and pin-7 at the PCM. If continuity is not present, repair the harness as necessary.
2. Check for continuity between the Camshaft Position Sensor output wire and pin-44 at the PCM. If continuity is not present, repair the harness as necessary.
3. Check for continuity between the ground circuit wire at the distributor connector and ground. If continuity is not present, repair the harness as necessary.

1. While observing the voltmeter, crank the engine with ignition switch. The voltmeter needle should fluctuate between 0 and 5 volts while the engine is cranking. This verifies that the camshaft position sensor in the distributor is operating properly and a sync pulse signal is being generated. NOTE: If sync pulse signal is not present, replacement of the Camshaft Position Sensor is necessary.

Terms of Use

You did not specify year or engine size, but...

The crank position sensor is located inside the timing cover, behind the crank pulley.

The wiring for it extends out of the timing cover by the motor mount upwards to a three wire triangular connector. On four cylinders the connector is mounted by the front corner of the head. V6 models the connector is mounted in the valley between the heads.

Later 4cyl models integrate the connector into the lower cover, but the sensor location is still the same.

DTC P1391 is "Intermittent loss of Camshaft Position Sensor (CMP) or Crankshaft Position Sensor (CKP)". So the problem is with the CMP or CKP or the wiring in the circuit.
The Camshaft Position Sensor is located in the distributor on all engines.
For this test, an analog (non-digital) voltmeter is needed. Do not remove the distributor connector from the distributor. Using small paper clips, insert them into the backside of the distributor wire harness connector to make contact with the terminals. Be sure that the connector is not damaged when inserting the paper clips. Attach voltmeter leads to these paper clips.

1. Connect the positive (+) voltmeter lead into the sensor output wire. This is at done the distributor wire harness connector.
2. Connect the negative (-) voltmeter lead into the ground wire.
3. Set the voltmeter to the 15 Volt DC scale.
4. Remove distributor cap from distributor (two screws). Rotate (crank) the engine until the distributor rotor is approximately in the 11 o'clock position. The movable pulse ring should now be within the sensor pickup.
5. Turn ignition key to ON position. Voltmeter should read approximately 5.0 volts.
6. If voltage is not present, check the voltmeter leads for a good connection.
7. If voltage is still not present, check for voltage at the supply wire.
8. If 5 volts is not present at supply wire, check for voltage at PCM 32-way connector (cavity A-17). Leave the PCM connector connected for this test.
9. If voltage is still not present, perform vehicle test using the DRB scan tool.
10. If voltage is present at cavity A-17, but not at the supply wire:
    1. Check continuity between the supply wire. This is checked between the distributor connector and cavity A-17 at the PCM. If continuity is not present, repair the harness as necessary.
    2. Check for continuity between the camshaft position sensor output wire and cavity A-18 at the PCM. If continuity is not present, repair the harness as necessary.
    3. Check for continuity between the ground circuit wire at the distributor connector and ground. If continuity is not present, repair the harness as necessary.
    
    
11. While observing the voltmeter, crank the engine with ignition switch. The voltmeter needle should fluctuate between 0 and 5 volts while the engine is cranking. This verifies that the camshaft position sensor in the distributor is operating properly and a sync pulse signal is being generated. If sync pulse signal is not present, replacement of the camshaft position sensor is necessary.

Since you replaced the CKP, we can assume it is good for the time being. But I would inspect the flywheel for damage. A damaged flywheel will make a good CKP send a bad signal.

Crank sensor on the durango is located on the passenger side of the vehicle just at the rear of the cylinder head, at the base of the block where the trans bell housing and engine block mate together you should see to bolt and a wiring harness with a two wire connector there.

The wiring that feeds a signal from the crank position sensor to the computer should be checked first. Disconnecting and reconnecting the wiring connector may help. Without the right diagnostic equipment, it is difficult to determine if the sensor is at fault.