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Automotive RepairDiagnostics & Troubleshooting3MediumVehicle Owner / Enthusiast$ implied

Intermittent rough engine running, turbo lag, and exhaust smell in cabin on BMW N47 diesel after DPF/EGR modifications, likely due to forced DPF regeneration cycles and lack of proper ECU reset.

No diagnostic solution to identify root cause of sporadic limp mode and regeneration cycling without CEL, and no way for DIYer or mechanic to verify if DPF values were reset properly.

Severity

3Medium

Willingness to Pay

implied

Added

Jun 1, 2026

App Concept

DieselDoc Pro

A mobile diagnostic app for diesel vehicle owners and mechanics that reads advanced ECU parameters like DPF soot/ash mass, backpressure sensor values, and regeneration status. It provides guided troubleshooting for limp mode and regeneration issues, including alerts for incomplete resets after DPF cleaning or EGR delete.

Key Features

Reads hidden DPF and EGR-related ECU parameters without dealer tools
Guided diagnostic flow for intermittent limp mode and regeneration cycles
Historical logging to capture sporadic events
Alerts for missing ECU resets after mechanical work

Target Users: DIY diesel car owners and independent repair shops working on BMW, VW, Mercedes, and other European diesels with DPF/EGR issues

Revenue Model: $19.99 one-time purchase per vehicle license, or $49.99/year subscription with cloud logging and remote mechanic sharing

Existing Solutions Mentioned

DPF cleaningEGR delete via software

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