What Is This Error Code P1391 Mean - Chrysler Cars & Trucks

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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Error Code P1391 is defined as CMP or CKP Signal Intermittent Condition. It refers to intermittent conditions in the CMP (camshaft position sensor)

You can google your question for the answer. About 8,650 results (0.52 seconds)
All the codes are OBD2, Where did you get code, you should been told what it mean. anyone can buy a $200.00 diagnostic reade and it comes with the meaning

2001 what? We need the make, model and mileage in order to help.

This code refers to the crankshaft position sensor. The sensor may be bad and need replacement. If the sensor is bad it can cause the symptoms you are mentioning

P1391 means intermittent loss of CKP and CMP , these sensor are monitor when the engine cranking,or running,These can come from a damage flex plate for the cranksensor or damage tone wheel for the camsensor,to a failing cranksensor ,failing camshaft sensor, to even the harness intermittent connnection

P1391 Glow Plug Circuit Low Input (Bank #1)

• DTC P1391 or P1393 will set when the monitor indicates that all four glow plugs are not being powered on that bank. An open in the glow plug circuits, glow plug relay, glow plugs or monitoring circuit could be the possible causes.
  
  Both DTCs P1391 and P1393 together will set when the monitor indicates that all eight glow plugs are not being powered. An open in all glow plug circuits, the glow plug relay, glow plugs, fusible links or all three monitoring circuits could be the possible causes.
• Possible causes:
  • glow plug relay
  • glow plug shunt
  • open in glow plug circuit(s) or monitoring circuit(s)
  • glow plugs
  • PCM

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p1391 is intermitant loss of signal from crank sensor and cam sensor--change sensors!! change cam sensor first. good luck!! then try it, if still same way. change crank sensor.

glow plugs preheat the fuel to help the engine start.....when its hot outside its not that bad...the colder it gets the harder it will be to start with bad glowplugs..

intermittent loss of ckp or cmp.problem is in the distributor.make sure rotor not loose or distributor hold down bolt loose.camsensor on the distributor.also check to see if crank sensor is loose and out of adjustment.