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service soon light po48 code

1527 Views 2 Replies 2 Participants Last post by  Kpp
i own cadillac sedan de ville 1994 4.9 i know that code means egr system but did that means egr valve or that black box with wires?(i dont know its name)or something else?
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I means that the system is not working properly. It could be the solenoid that controls it, a vacuum leak or the EGR valve itself.
Thanks.....It was broken vacuum hose.
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