Question about 2002 Jeep Grand Cherokee

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Ok I have 2002 Jeep Grand Cherokee, I have replaced the spark plugs and the coil rail but still getting the code P0351 and I was wondering if this could be caused by some kind of sensor?

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The code indicates the coil pack or spark plug is malfunctioning. You can test this using an additional person. by removing the coil pack and spark plug, place the spark plug into the coil pack and ground the tang on the spark plug to the engine. Have someone start the engine and watch for a blue spark. if there is no spark, then the coil pack is malfunctioning. There is also ways to check the coil packs using a multimeter.

also, bee sure you didnt crack the ceramic part of the plug during initial installation.

Posted on Aug 01, 2010

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I have a 2001 jeep grand cherokee and it giving me four code p1391 p0351 p0352 p0353 i will like to know the problem please


For some reason you question has been duplicated several times, so I will answer this one.
Code 1391 may be a problem with the ABS system, the other three codes are concerning the first 3 coils. Your engine has direct spark so each cylinder has its own coil.
I would clear the codes and see which ones come back after a test drive. If the three coil codes come back the coils would need to be tested.

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1 Answer

Where are the spark plugs


Locate the spark plug wires in the Cherokee cylinder head. In the 4.0 liter engine, the spark plugs are below the coil rail assembly. On the 4.7 liter engine, the spark plugs are located under each corresponding engine coil.


Read more: How to Replace Spark Plugs in a Jeep Grand Cherokee ' eHow.com http://www.ehow.com/how_4484626_replace-spark-plugs-jeep-grand.html#ixzz27zi6736d

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1 Answer

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