Question about 2001 Dodge Ram 2500 Truck

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2002 Dodge Ram 1500 5.9 liter GAS not Diesel, giving code of p1391 which means cam/crank sensor - we have changed crank sensor and it's running worse - we have to start it about 3 times before it will quit dying and now it's dying everytime we come to a stop. Help!

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Most likely its the throttle body sludged up . clean the throttle body and butterfly . this will only help if there is an idling problem . ck for codes and ck freeze frame data for more help

Posted on Aug 05, 2010

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1 Answer

P1391 Dodge Ram


So is there a question?

Oct 09, 2015 | 1999 Dodge Ram

1 Answer

Keep getting code 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.

Feb 18, 2014 | Chrysler Cars & Trucks

1 Answer

Car is hesitating have error code p1391 check engine light is on what does this code mean it is not in the book I just put a crank posistion sensor and that fixed it ,now it is doing it again only worse...


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.

Nov 26, 2010 | 2002 Chrysler Sebring

1 Answer

What does the p1391 code on a 99 dodge ram 1500 5.2l v8 meen


check engine light and code P1391 crank or cam position sensor

The above can cause rough idle on the Dodge Ram 1500 5.2L V8 Engine.

Can try to replace the sensor, but verify that the wires are ok first.

Aug 12, 2010 | Dodge Pickup Cars & Trucks

1 Answer

I got a code readout of P1391. What does it mean for a 1996 dodge pickup with a 5.2L engine?


The Engine Control Unit continuously receives information from sensors on the cam and crank shafts. This code indicates that there was an intermittent loss of signal from one or other of these sensors due to a sensor fault or a loose connection. If the fault persists the ECU will loose track of the relative position of the crank and cam and this will give rise to erratic engine firing. Try thoroughly cleaning the contacts within the electrical connectors to these sensors and see if this resolves the issue.

May 24, 2010 | 1996 Dodge Ram 1500 Club Cab

1 Answer

P1391 c0de 2002 dodge ram van no start


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.
Hope that helps.

Mar 16, 2010 | 2001 Dodge Ram 2500 Truck

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.

Dec 15, 2009 | 2001 Dodge Ram 1500 Truck 2WD

1 Answer

Rough idle and misfire on ram truck


Change cam sensor & erase codes.( disconnect battery for a minute or so after.) 340 & 1391 refer to cam sensor problem, and all other 300 codes are cylinder misfires that should disappear when cam sensor fixed.

Jul 09, 2009 | 1997 Dodge Ram 1500 Club Cab

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