P0300 cel on

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05-20-2010, 05:32 PM

rohanmax14

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P0300 cel on

I got this cel at first start up in the morning my engine shaking at idle or even at driving.

Please help.

05-20-2010, 07:06 PM

KCMAXX

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Hit an Auto Zone or depending on your demographic, Advance Auto Parts.

They have the scanner needed to diagnose and reset the CEL for free.

05-20-2010, 10:09 PM

rohanmax14

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Quote:

Originally Posted by KCmaxx

Hit an Auto Zone or depending on your demographic, Advance Auto Parts.

They have the scanner needed to diagnose and reset the CEL for free.

I did went to autozone but they said is P0300 n they don't know what is.

Nissan service guy tld me do not clear cel code if I do it'll never come back n Ill never know what happen to my engine after that.

05-21-2010, 09:37 AM

Oolatec

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Multiple cylinder misfiring. More info here:

http://www.obd-codes.com/p0300

05-21-2010, 06:39 PM

rohanmax14

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Don't our car call have head gasket or value cover gasket?

05-22-2010, 03:26 PM

rohanmax14

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Update:: we changed the 02 sensor A/F sensor 1 bank 2. They was 2 different color shown on 02 sensor n is was white n dark brown. After that engine stop shaking n it run better.

We clean MAF sensor. We also look at coil wire n spark plug none of them shown bad sysmbol. We check fuel pressure is was at 50 psi n fuel injector is in good condition.

Why did that happen n what make 02 sensor go bad?