Toyota and Lexus Firmware M-1374-574357838414513D6-noegr-no0400-0405.tun.mod
A catalog reference for the modified Toyota or Lexus firmware file M-1374-574357838414513D6-noegr-no0400-0405.tun.mod and its EGR-related labels.
M-1374-574357838414513D6-noegr-no0400-0405.tun.mod is a modified calibration file whose name indicates changes associated with exhaust gas recirculation, or EGR. The identifier alone does not establish its exact vehicle application or control module.
What the variant labels indicate
The noegr label suggests an EGR-related modification. EGR routes a controlled amount of exhaust gas back into the engine intake to reduce combustion temperatures and nitrogen oxide emissions. The filename does not establish exactly how this file changes that operation.
The no0400-0405 label points to diagnostic trouble codes P0400 and P0405, which concern EGR flow and the EGR position sensor circuit respectively. In this modified filename, the label suggests those codes may be suppressed or otherwise altered. It does not show the precise diagnostic changes or confirm how the vehicle will respond to an EGR fault.
The .tun.mod ending identifies this as a modified tuning file rather than a clearly labeled stock calibration. The complete identifier distinguishes it from similarly named catalog entries, but it does not by itself prove compatibility with a particular Toyota or Lexus model.