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Chrysler Repair/2004 Chrysler Sebring code P0300

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Expert: - 1/21/2012


Question
We keep getting a code p0300 with the check engine light coming on. We have had a tune up done with fuel injection cleaning, new thermostat put in recently. Also sometimes car won't start. To get to start we have to hold the key turned and hit the gas while in park. It is not throwing a code for the not starting and it is not all the time.
Any ideas on what this can be? Mechanic is at a loss since it is only throwing the same p0300 code and it is not specific.
Its a 2.7L, V6 convertible model

Answer
Hi Lisa,
Unfortunately there are quite a few possibilities. If you will send me a NEW question and check the box to make it PRIVATE, and then tell me your email address in the text area of the question, then I can copy the specific list of possible items from the manual for that engine, attaching that to an email directly to you. I don't normally see the email of a questioner, so you have to give it to me as a private, new question.
Because it doesn't appear that a single cylinder is missing, but rather all are doing it that means it has to be an issue that affects all the cylinders. There is a step-by-step procedure outlined in the troubleshooting manual which you could give to your mechanic. It may be an issue with the fuel pressure not being correct based upon how you are able to get it to start. It is that sort of observation that might shorten the list of things that need to be checked.
Roland

Chrysler Repair

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Roland Finston

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I specialize in Chrysler/Dodge/Plymouth cars, minivans, and SUV's for the model years 1982-2008 based upon my 50-year DIY experience, factory shop manuals and wiring diagrams. I offer fast repair advice to help you minimize repair costs by helping you diagnose and do it yourself. Problems with electronically controlled engines and transmissions as well as body wiring problems are my specialty.

I take questions one at a time between 8am and 10pm CT and attempt to answer within 20 minutes. "Maxed Out" means I am answering another question of otherwise busy, so try again later.

There are answers on file to more than sixteen thousand Chrysler questions at your finger tips: put a few key words in the "find" box (above) or click on "view past answers" for a chronological list of my q and a's. Don't use "Add to this answer" if you still have a question...ask it. As to trucks and jeeps I only have manuals for the '04-'06 model years.

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Five decades as a 'do-it-yourselfer' on domestic and imported cars

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Yahoo Autos Group called The Chrysler Lebaron Club (co-moderator)

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Degrees in Physics/bruised knuckles.

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"Top expert of 2010" and "2011" at Allexperts. Among top 50 experts for years 2006-2009 at Allexperts.

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