Hello! No, not at all...After you change the EGR, disconnect the + battery terminal for 3-5 minutes...Reconnect...And if the EGR was the cause of the fault the code will clear...Make sure you have the stereo code...If not, connect a regular 9 volt battery to a cigar lighter plug (pay attention to polarity)...Plug it into the cigar lighter socket before you disconnect the battery...It will maintain power to the stereo...Guru...Saailer
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