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Re: 2003 Impala 3.4L P0401 code help
Posted to Technical Discussion Forum on 3/1/2007 1 Reply

A bit more info here...

Today we have another '03 Impala 3.4L in here. Cleared the monitors and went on a drive. We noticed that the "good" car would cycle the EGR 6 times while coasting from 50mph.

Our "bad" car cycles the EGR 4 times. Huh???

Both are i... Login to read more.

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