Question about 2000 Dodge Ram 1500 Truck

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My truck has a code p1391 im reasonably sure its the crank sensor but im not sure where its located on the truck. its a 2000 ram 1500 with a 5.2 and a manual transmission if anyone can help me on this i would love it

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Your code could be either a intermittent signal from the cam or crank sensor.
the crank sensor is located on top the engine clear in the back where the transmission bolts to the engine

Posted on Feb 07, 2010

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I just bought a 2001 Chrysler Intrepid and the ck engine light came on..got that checked and they said it was a code P13, maybe a sensor crank or something ..any solutions

Posted on Feb 10, 2010

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I have a 98 dodge ram 1500 with a 5.2L. I got a code of p1391. i changed out the crankshaft sensor, and still wasnt working right. I was then told to change out the computer, so i did, and still not...


try cleaning the throttle body, iside of it take a tooth brush and carb clean and scrub both bores especially were the plates rest at idle. the code is a missfire code. dirty throttle bodys cause all the problem you mention and then some.

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Cmp And Ckp are your cam and crank sensors. Basically whats going on is one of those sensors are malfunctioning causing the system to adjust its resources. ie the pcm guesses how fast the cam or crank is turning and adjust timing as nessessary. Pull the crank sensor and inspect for damage. do the same for cam. You may need a book for there locations. Also using a test meter, check there output signals for correct voltage. This should point you in the right direction. Hope it helps.

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Code P1391 Loss of crank or cam sensors,P0340 No cam signal at the pcm. I would replace the crank sensor first. Your cam sensor is part of the dist. on 5.2/5.9 engines.
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1 Answer

My ram 1500 5.2 motor give a code p1391 what is


P1391 - Intermittent loss of CMP or CKP.

Generally, this code will indicate that the crankshaft sensor is faulty. The sensor is mounted in a fixed position in the engine block. The tip of the sensor protrudes into the crankcase at a distance of 0.05 plus or minus 0.02 inch from the crankshaft. I would check the wiring harness for loose connections. Inspect the trigger wheel behind the crankshaft pulley and the sensor for damage. replace if needed.


If a crank or cam sensor fails, the engine will not start. both of these sensor circuits can be checked with a voltmeter or lab scope.If the sensors are receiving the correct amount of voltage and have good low-resistance ground circuits, their output should be a pulsing digital signal or voltmeter reading while the engine is cranking.

If any of these conditions do not exist, the circuit needs to be repaired or the sensor needs to be replaced. The location of the Cam shaft sensor will be mounted on the distributor. Use the sensors terminals for testing. Over 7 volts is ok, but anything below that at the sensor will indicate that the sensor wires are bad. If the voltage is low at the PCM, the PCM is suspect.

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