2010 Wrangler P0300 CEL code - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep Wrangler Forums > JK Wrangler Technical Forum > 2010 Wrangler P0300 CEL code

Gibson WK HEMI 3" Catback - 5 Day Special!The ULTIMATE "Selectable" Locker System! Brough**Flash Weekend Sale** Rockridge4wd.com Only!

Unread Today, 07:50 AM   #1
Registered User
Join Date: Mar 2008
Location: Indiana
Posts: 1
2010 Wrangler P0300 CEL code

I have a 2010 Jeep Wrangler with just under 100k miles on it. I've put a 2" supsension lift on it, cold air intake, gibson dual exhaust and headers. It has ran fine, but last week my wife was driving it, filled it up and when she took off it started misfiring, throwing codes and flashing the CEL. Checked the codes and it suggested changing the coil pack, replaced it, the sparkplug wires, and the sparkplugs, and it is still doing it. So, get on the Forum, find that it could be the O2 sensors, so I order them change them and still doing it. It will idle and when it does it smells like it is running really rich. I plan on changing the Crank Positioning Sensor next, but I'm running out of sensors to replace. I had taken it in to a local garage, and they checked to make sure the gas wasn't bad, also I wanted to verify all my work, so they checked it and also did a compression test, which came back within specs.

So, I guess my question is what am I missing?

sguerrero is offline   Reply With Quote Quick reply to this message

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.
Note: All free e-mails have been banned due to mis-use. (Yahoo, Gmail, Hotmail, etc.)
Don't have a non-free e-mail address? Click here for a solution: Manual Account Creation
Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.