Question about 1999 Jeep Cherokee

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1999 Jeep Cherokee shows PO 1391 Manufacturer Control, I have replaced the Camshaft Position Sensor ( also called Distributor Switch Plate by the Dealer) What is PO 1391? How do you diagnose it ? Ho

I have a PO 1391 "Check Engine Light Code" I have recently replaced the Distributor Switch Plate . I believe this is the same as the "Camshaft Position Sensor?" I'm I correct in assuming that is correct. I couldn't erase the PO 1391 code even with the use of a scanner. How do you erase this code? Thanks. Phil

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6ya6ya
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Posted on Jan 02, 2017

chryslertech
  • 115 Answers

SOURCE: remove the camshaft position sensor from my 1999 jeepcherokee

The Camshaft Position Sensor (CMP) on the 4.7L V - 8 engine is bolted to the front side of the right cylinder head. Disconnect the sensors connector. Take out the bolt that holds the sensor in place. Lightly pry out the sensor being careful not to break it. Clean out the hole and install the new sensor( put a little oil on the new sensors o-ring to help installation).

Posted on Feb 27, 2009

crayzeetrayn
  • 837 Answers

SOURCE: 2001 Jeep Grand Cherokee code P1391

I would check to be sure that the timing chain hasn't jumped at all ..

Posted on Mar 25, 2009

roniecon
  • 6826 Answers

SOURCE: No fire to coil from coil on 96 model Jeep Grand Cherokee.

You need to put the harmonic balance for the 96 jeep on this motor,then put the crankshaft sensor on for the 96 jeep on the vehicle,this should fix you up.The crankshaft sensor and the harmonic balance have to go together.If I can be further help,let me know.>>roniecon@gmail.com

Posted on Aug 18, 2009

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  • 225 Answers

SOURCE: 1998 Jeep Cherokee engine runs rough.I used a code

check your crankshaft sensor could be a possiblity, check the compression

Posted on Nov 03, 2009

  • 124 Answers

SOURCE: I have a 1999 jeep grand Cherokee larado V6.

The P1391 code indicates that the crank or cam sensor(s) have sent an intermitant code to the ecm. The most common cause for this is loose wiring or debris on the contacts of one of the sensors.

Posted on Nov 05, 2009

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1999 jeep cherokee turns over. will not start. No spark. "Clicking" noise from distributor / switch plate area when key is on.


sounds like a bad cps(crank position sensor)location should be on the drivers side of the bell housing of the transmission near the topside.

Oct 04, 2013 | 1999 Jeep Cherokee

1 Answer

I have a 1999 Jeep cherokee with a 4.0 liter engine. It would not start. There was no check engine light. OBDII check no codes found. I have changed the ignition coil, spark pickup module, and the c


Hi there:
It's definately the next logical step since P1391 is for CMP (Camshaft) or CKP (Crankshaft) sensor loss. The cam sensor is available seperately, it's extremely easy to change, you don't even have to pull the distributor. Just take the cap and rotor off then pull the cam sensor out.



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Nov 06, 2012 | 1999 Jeep Cherokee

1 Answer

Where is the camshaft position sensor for 1999 dakota v6


If your dakota wont start and the computer says its the camshaft position sensor you will need to look for a "distributor pickup plate" not a "camshaft position sensor. Advance Auto etc has these usually in stock for about $50 you do not need to go to the dealer. Looking for a cam pos sensor on the 1999 dakota is a dead end its called the dist pu plate. Its so easy to install. Find the distrubutor behind at the top back of engine near firewall. Two screws are phillips head. You will have to unplug some of the spark wires (be sure you know exactly which wires go back to where. You can remove only one side of wires to remove the distributor. Take out the rotor the plate just lies down on the distributor. Replace it the pickup plate magnet is towards the firewall and down. It has two places on the plate that catch the distributor phillips screws. Install in reverse of removal. Disconnect battery pos or neg. Turn ingnition on for 10-30 seconds to reset check engine light. Back on road.

Jan 28, 2012 | 1999 Dodge Dakota

1 Answer

I have a p 1391 code on a 1999 jeep grand cherokee 4.7 liter v-8 engine. I just installed a Camshaft position sensor and also the ECM. I initially installed these two parts and started the vehicle up and...


you should check the crank position sensor . The plug may need to be tightened up or its pins bent a bit to make a better connection. Has any other work been done recently?

Nov 20, 2010 | 1999 Jeep Grand Cherokee

1 Answer

What is code 1391 for on 1999 jeep grand cherokee


Code 1391 = An intermittant loss of CMP (crankshaft position sensor) or CKP (crankshaft position sensor. This code could be related to just a bad connection at either sensor or the wiring harness, check the connections and be sure they are clean and tight fitting with no loose wire connections also within the connector itself. Otherwise you may end up replacing one or both of theses sensors to correct this issue,unless you have an oscilloscope to isolate which sensor.

Jul 16, 2010 | 1999 Jeep Grand Cherokee

2 Answers

I have a diagnostic code 340 and 320 on a 1997 Jeep Cherokee. What might the problem be?


DTC P0340 - Camshaft Position Sensor Circuit Malfunction
Symptoms can include:
  • Hard starting or no start
  • Rough running / misfiring
  • Loss of engine power
Causes:A code P0340 could mean one or more of the following has happened:
  • a wire or connector in the circuit could be grounded/shorted/broken
  • the camshaft position sensor may have failed
  • the PCM may have failed
  • there exists an open circuit
  • the crankshaft position sensor may have failed

Possible Solutions:With a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Visually inspect all the wiring and connectors in the circuit
  • Check for continuity in the circuit wiring
  • Check the operation (voltage) of the camshaft position sensor
  • Replace the camshaft position sensor as required
  • Check the crankshaft position circuit as well
  • Replace circuit wiring and/or connectors as required
  • Diagnose/replace the PCM as required

DTC P0320 also have with this wrong.

Jul 13, 2010 | 1997 Jeep Grand Cherokee

1 Answer

Where is the camshaft sensor located on my 99 Jeep Grand Cherokee


If you still have a cap rotor and ignition wires, it's inside the distributor. If not, it is the part where the distributor used to be (center rear of the engine behind the intake manifold)

Feb 19, 2010 | 1999 Jeep Cherokee

2 Answers

Where is locate the camshaft position sensor on 2001 jeep grand cherokee laredo limited 4.7 l


The camshaft position sensor is located inside the distributor. It is a hall effect swich, simply remove the distributor cap and the rotor and you can lift it out, unplug and replace.
Have fun but beware a bad crankshaft position sensor can cause a false cam sensor code to be set sometimes.
Good luck.

Dec 05, 2009 | 2001 Jeep Grand Cherokee

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