Toyota and Lexus t105-noegr-nofap.mod Firmware
A catalog overview of t105-noegr-nofap.mod and its EGR and particulate-filter modification labels.
t105-noegr-nofap.mod is a modified firmware filename whose labels indicate changes associated with exhaust gas recirculation (EGR) and a particulate filter. The filename alone does not establish the controller, vehicle application, or exact software changes.
What the variant labels indicate
noegr commonly denotes an EGR-related modification. EGR normally routes a controlled amount of exhaust gas back into the engine to reduce nitrogen oxide formation. nofap commonly denotes a modification related to a diesel particulate filter, often called a FAP, which traps soot in the exhaust. The labels do not show precisely how either function has been altered in this file.
The .mod extension identifies this as a modified variant rather than establishing it as stock Toyota or Lexus calibration software. The t105 portion is not enough on its own to identify a specific control module or compatible vehicle.
Changes affecting emissions controls can alter diagnostic behavior and may make a vehicle noncompliant with road-use emissions requirements. The filename does not establish whether any physical components have been changed.