Car owner has intermittent crank-no-start issue that mechanics cannot diagnose because it doesn't trigger a check engine light or repeat at the shop.

Workarounds Described

• took car to shop but problem didn't repeat, so they won't dig deeper
• owner suspects specific sensor (crankshaft position) based on 0 RPM gauge reading during crank

Implied Software Gaps

• Continuous data logging device that captures intermittent sensor failures without check engine light
• Reporting tool that turns raw OBD data into a diagnostic report mechanics can trust

DiagnoseDash

DiagnoseDash is a mobile app and OBD-II dongle that continuously monitors vehicle sensor data, including crankshaft position, fuel pressure, and RPM, during both normal driving and cranking events. It records intermittent faults even without a check engine light, providing mechanics with actionable historical data to diagnose elusive no-start issues.