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code p0300 Chevy Malibu 03 142k miles
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camron1012
New User
Apr 6, 2015, 4:55 PM
Post #1 of 6
(2780 views)
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code p0300 Chevy Malibu 03 142k miles
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Hi guys, I really need help I got a car 4 weeks ago I brought a car (03 Chevy Malibu base 142k mil, 3.1L V6) and the check engine light was on, so it was no way for me to pass state inspection. I replaced the battery, did a oil change and a coolant flush. Went over to autozone and had them scan it for me and code p0306 was coming up, so I changed the spark plugs in the front cylinders (2, 4, 6) and the wires. So I went to a shop to have them inspected it and put a sticker on it. But it failed, so the shop started working on it to get the code to clear, first they changed the coil pack thin the injection valve, nothing worked thin they checked the locker arms in the motor and seen that one of them was broken and lost the thread. They replaced it thin seen it messed up a piston and they replaced that. They started it back up and the p0306 code was gone and now they say its giving a p0300 code. They have had my car for 7 days now. Can anyone help me out on what to tell them to check next.
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Mustang95
New User
Apr 28, 2015, 4:19 PM
Post #3 of 6
(2670 views)
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Re: code p0300 Chevy Malibu 03 142k miles
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ok so there are alot of options for the code p0300 here is the list Faulty spark plug Faulty ignition coil Clogged or faulty fuel injector Intake air leak Fuel injectors harness is open or shorted Fuel Injectors circuit poor electrical connection Ignition coils harness is open or shorted Ignition coils circuit poor electrical connection Insufficient cylinders compression Incorrect fuel pressure I would get the electrical connections check first and get the fuel pressure checked and clean the injectors. That will be the easy and relatively cheap things to check first
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 28, 2015, 5:28 PM
Post #4 of 6
(2661 views)
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Re: code p0300 Chevy Malibu 03 142k miles
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Mustang95 Please refrain from posting generic junk that you copied off the Internet. There are a hundred things that can set a P0300 and it needs to be troubleshooted by a professional. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Hammer Time
Ultimate Carjunky
/ Moderator
Apr 28, 2015, 5:48 PM
Post #6 of 6
(2652 views)
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Re: code p0300 Chevy Malibu 03 142k miles
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If you really are a tech, then you know damn well that generic JUNK isn't going to find his problem. You simply copied a generic list of possible causes for a code that we know has far more possibilities. We don't Google answers here. Your list is right here word for word. http://engine-codes.com/p0300.html ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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