Question about 2004 Jeep Grand Cherokee
The code means cylinder one is not producing power.
The problem could be spark, fuel, or something mechanical.
Posted on Jan 17, 2013
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Posted on Jan 02, 2017
One long bolt at the top - requires a 7mm socket to remove the bolt. The light housing will pry out with a screw driver. There are three ball and socket type connectors that hold the housing in and I just pryed off the plastic housing carefully and "balls" pop out of the sockets. Finally, I was replacing the faded plastic housing and it came with a new wiring harness. It's impossible to reach the connector to use the new wiring harness that comes with the new plastic light housing. So just use the existing wiring harness with the new light assembly.
Posted on Feb 06, 2009
If you have the same pulley arrangement that most 4.0 engines have that pulley is an idler not a tensioner. Your power steering pump has a pivot bolt, and a slide under the pump. You adjust belt tension using the pump.
Posted on Apr 05, 2009
it is located at the back of the engine on top of the transmission bell housing,the plug runs over to the passenger side of the engine bay and it comes out from behind the engine,you can actually get your hand on the sensor itself from under the hood on the drivers side,and i believe its a 13mm bolt holding it in,the new sensor will have a sticker on the end of it...leave it there,it is used for correct spacing between the sensor and the flywheel,hope this helps
Posted on Sep 23, 2009
Testimonial: "Everything was just like you said but as a not atleast for my jeep it is an 11mm not 13mm. Works great so far (keep fingers crossed) "
Not necessarily, the catalyst monitor uses two oxygen sensors to monitor the operation of the converter. One or both of the sensors may need replacement. One tip, they are much easier to remove from a hot system, although the chance of a burn is greater.
Posted on Dec 31, 2009
P0301 is #1 cylinder misfire detected and is most likely related to a worn spark plug that is need of replacement. All plugs should be replaced if replacing one. Not sure how many miles you have on this vehicle, or if plugs were ever installed, but this is the basic step to take in diagnosis.
Posted on Jun 02, 2010
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