Smart diagnostic reference

Explore 1 connection profiles and 128 enhanced definition variants recorded for Smart. Reference relationships describe the library, not road-test coverage.

Vehicle and connection profiles

Smart FourTwo EV / FourFour EV (W453 2017-2020)Smart · 2017–2020

Enhanced PID meanings

Browse individual signal meanings, units and exact profile links.

Browse Smart enhanced signals

Trouble-code reference families

No manufacturer family is assigned in this catalog snapshot. Generic OBD2 references remain separately available.

Source and applicability

OBD Lens production library legacy-owner-2026-10-09-v81. This is a scoped technical reference, not a scan of your car. A catalog relationship does not certify that every ECU, year or engine returns the same signal or code definition.

Read the reference method

OBD Lens reference library · catalog legacy-owner-2026-10-09-v81. Sources and scope