Question about 2002 Jeep Grand Cherokee
Yes thats what i thought its the crankshaft sensor located on driver side top of trans bellhousing make sure if you replace it hold it down while you tighten the bolt it has a few thousands of an inch of adjustment and it makes a difference . price it from an autoparts store they are a lot cheaper than a dealer. this will help
Posted on Oct 03, 2010
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Posted on Jan 02, 2017
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A code P0300 may mean that one or more of the following has happened:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires,etc. Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.
Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.
Get all this details checked by your regular car maintenance mechanic.And replace the faulty.This will help.Thanks.Helpmech
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