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Old 10-09-2002, 05:18 PM
mbdoc mbdoc is offline
Join Date: Mar 1999
Location: Tucker, Ga USA
Posts: 12,153
Normally misfire codes P0 30(?) mean that the ignition system for those cylinders are at fault. ie: spark plugs, coils, & saprk plug wires OR connectors.

The P0 400 means that the EGR system didn't allow enough recirculated exhaust into the intake durning decel to lower in intake vacuum. ie: partially plugged metal tube from EGR valve to intake.
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