2021 MX13 pac car dpf and scr efficiency issues in need of egr tuneup

[mikkhh]

Well I did swap around the aftertreatment control modules. Will see if fault code travels to another truck now... Also cleaned vent hole on both of them, now both trucks read 0-1hpa with engine off ignition on.

Most likely there is barometric sensor inside those modules and it self calibrates and takes that to account for calculating differential pressure?






I did also clean plugs properly, also took of cover of plug to check for any visibly damaged wires and to clean from all of that dirt and gravel. Did not see anything wrong