What do code p1391 mean

Both point to a problem with a module rather than a sensor. We have an auto-electrician Expert here and hopefully he will be along. The first thing to do is clear the codes and see if they come back. If they do, you need a good auto-electrician, not a mechanic and not a guy from Autozone.

This tells you what causes P1698.

P1698 JEEP Code - PCM Fault No CCD Message From TCM

https://www.engine-codes.com > p1698_jeep
'P1698 JEEP code possible causes · Faulty Transmission Control Module (TCM) · Transmission Control Module harness is open or shorted · Transmission Control Module ...

This tell you all the items that can cause P1391.

P1391 JEEP Code - CMP or CKP Signal Intermittent Condition

https://www.autocodes.com > p1391_jeep
'P1391 JEEP code description ... The Powertrain Control Module (PCM) monitors the Camshaft Position Sensor (CMP) Or Crankshaft Position Sensor

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P1391 Chrysler - CMP or CKP Signal Intermittent Condition http://engine-codes.com/p1391_chrysler.html#ixzz3dGwWFAtB
Your other codes are all detailed here:

P0355 Ignition Coil Primary Secondary Circuit Malfunction

Codes are all over the internet --Google them

OBD P1391

You may need a shop manual for this one.
Code 1391 means the crank sensor or cam sensor signal is not steady or dead at times.
The distributor acts as the cam sensor, so it could be that or the crank sensor, or a problem with the wiring harness.

Check camshaft and crankshaft sensors and wires leading to them. This code means it the computer isn't getting signal from one or both sensors.

P1391 DODGE - Electronic Brake control Rough Road Data Unusable/unreadable
You need to see the dealer on this, it may be programing issue.

P1391 - Electronic Brake controll Rough Road Data Unusable. You need a factory repair manual and a live data scanner to diagnose repair this problem. The cause is far from cut and dry

I have done some research and found my shop manual for a Pacifica doesn't show a code P1391. I found it at another web site it's a crankshaft or cam sensor. What I found is if the car is running somewhat smooth replace the crank sensor if it is shaking when you accelerate there is a good chance your flexplate(flywheel) is cracked or broken.

Hello
Here are the meanings of these codes.
P1391 FORD - Glow Plug Circuit Low Input Bank #1
P1393 FORD - Glow Plug Circuit Low Input Bank #2
I think you most likely have a burnt out Glow pug controller. Whenever this controller is replaced all glow plugs should be tested for proper function.

P1391 is a code relating to either the Camshaft or Crankshaft sensor. It could also be a wiring connector fault. Hope this helps...