Toyota Yaris 1.4 D-4D Firmware 1037400412 P552V109

The catalog entry Toyota Yaris 1.4D4D Bosch_EDC17CP07 1037400412 P552V109 DPF+LSU-off.bin identifies a modified diesel engine control unit file. Its label indicates changes related to the diesel particulate filter (DPF) and LSU, commonly the exhaust oxygen sensor. The filename identifies the intended functions but does not establish the exact calibration changes inside the file.

What the Bosch EDC17CP07 controls

The Bosch EDC17CP07 is an engine control unit for diesel applications. In the listed Yaris 1.4 D-4D context, it manages fuel injection and coordinates engine operation using inputs such as engine speed, load and temperature. It also manages emissions-related functions, including monitoring that supports exhaust aftertreatment.

The numbers 1037400412 and P552V109 distinguish this cataloged calibration from other files in the controller family. They should be considered together with the vehicle and controller names rather than treated as proof that a file for another EDC17 application is interchangeable.

What DPF+LSU-off means

The DPF+LSU-off label describes the named modified variant, not a stock calibration. A DPF traps soot in the exhaust and normally relies on ECU-managed regeneration to burn accumulated material. An LSU sensor measures exhaust oxygen and can provide feedback used by the engine's emissions controls.

In practice, an off-labeled file is intended to alter the relevant control or diagnostic behavior. The name alone does not show which monitoring routines, fault codes or regeneration strategies have been changed, or whether the physical components remain installed.

DPF or oxygen-sensor faults can also result from wiring, exhaust leaks, sensor problems or underlying engine issues. Disabling monitoring does not identify or repair those causes, and emissions-control modifications may be unlawful for road use.