Question about 2004 Chevrolet Impala
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Posted on Jan 02, 2017
there are a couple of things, first make sure there are not restriction in the exhaust, i know the dealer has had to replace converters under warranty because of this problem, then theres a reflesh program for the computer due to this problem, and lastly,run with egr off make sure it clean of carbon,carbon gets stuck in pintle sets check eng lightbut carbon then blows by so when you remove egr you see nothing, well start with these good luck.
Posted on Nov 28, 2009
SOURCE: engine check light p0300
P0300 is a "random/ multiple cylinder misfire detected" and can happen if you change plug wires and cross two when re-installing them (which I did on my 99 Jimmy just 2 weeks ago), or it could mean one of the coilpack coils is failing, etc..
Posted on Dec 18, 2009
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