P1391: No clue now?
#1
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Join Date: Jan 2011
Location: Indiana
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Year: 1997
Model: Cherokee
Engine: 4.0 Litre
P1391: No clue now?
Hello all,
I made a post about a couple weeks ago about my jeep bucking and missing. I have changed the Crank position sensor and the cam position sensor and from as far as I know, those two are the ones that would throw that code. I ran it after being cleared and the code did return, which I didn't have when I made the post a couple weeks ago.
My only guess may be a corroded connection at the ECM? I'm changing the throttle body tomorrow, but I am not to optimistic about that solving the problem.
The code reads as:
P1391
-Interim loss of CMP or CKP
Any advice on where to go from here would be much appreciated!! Just hit a deer in my daily driver tonight so I would love to have my jeep to drive around until I get that all fixed up.
Thanks!
I made a post about a couple weeks ago about my jeep bucking and missing. I have changed the Crank position sensor and the cam position sensor and from as far as I know, those two are the ones that would throw that code. I ran it after being cleared and the code did return, which I didn't have when I made the post a couple weeks ago.
My only guess may be a corroded connection at the ECM? I'm changing the throttle body tomorrow, but I am not to optimistic about that solving the problem.
The code reads as:
P1391
-Interim loss of CMP or CKP
Any advice on where to go from here would be much appreciated!! Just hit a deer in my daily driver tonight so I would love to have my jeep to drive around until I get that all fixed up.
Thanks!
#2
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Join Date: Nov 2010
Location: In the middle of Minnesota!
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Year: 1999
Model: Cherokee
Engine: 4.0
I would get a can of electrical contact cleaner. Available anywhere including WalMart. Thoroughly spray the connectors for the crank sensor and the cam sensor. There are 2 crank sensor connectors; the one on the sensor itself and there is also one in the engine bay near the firewall / #6 injector. Add a small dab of dielectric grease and reconnect all sensors. A tiny bit of debris or resistance in a connector is a possibility that you need to consider. I've had this happen.
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