Code P1391

Tiny
RJ186
  • MEMBER
  • 2001 DODGE DURANGO
  • 4.7L
  • V8
  • 4WD
  • AUTOMATIC
  • 151,000 MILES
Would not start one day. Replaced fuel pressure regulator. That did not fix it. Had CEL and p1391 code. Put in new cam and crank sensors. Started fine. Warmed it up one day, shut off ten minutes into warm up. Started back up. Accelerating onto highway, it bogged out and tried to shut off. Turned it off, started it right back up. But kept bogging every time I hit the gas. Was told to use Mopar cam and crank sensors, did that, (with a spacer because they were rubbing). Now we still have the CEL and p1391. Mechanic claims he looked at the wires and connectors. We put in a brand new battery and nothing is helping. I do not have a bus code so I do not think it is a PCM issue, but I am no mechanic. So now I am here desperately searching for an answer. Please help!
Thursday, February 15th, 2018 AT 8:19 AM

1 Reply

Tiny
ASEMASTER6371
  • MECHANIC
  • 52,797 POSTS
Good afternoon.

Did the factory sensors resolve the running issue?

I attached possible causes below. Most of the possibilities revolve around wiring issues. Inspect the connectors for loose or damaged pins and that they are tight

Roy

Possible causes:
- CMP sensor out of SYNC.
- Damaged tone wheel/flex plate (crankshaft).
- Damaged tone wheel/pulse ring (camshaft).
- Irregular lab scope pattern of CMP signal.
- Intermittent CKP signal loss when wiring is wiggled.
- Irregular lab scope pattern of CKP signal.
- Wiring harness intermittent.
- Intermittent CMP signal loss when wiring is wiggled.
- Sensor connector/wiring.
- Sensor connector/wiring.
- Camshaft position sensor.
- CKP sensor connector/wiring.
- Crankshaft position sensor.
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Thursday, February 15th, 2018 AT 1:52 PM

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