what is a p1404 specific code, incorrect rear ratio
it's your egr valve you will want to try the following Get A can of CRC QD Electronics Connection cleaner and spray out the EGR connector and socket, allow to dry completely. Open the under hood fuse box and pull the PCM B fuse wile waiting for the EGR to dry out.Reconnect EGR and replace fuse. See if the code comes back. May end up cleaning the EGR or replacing depending.
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