Tell me your and engine type (Gas vs. Diesel). Share if you see three bars or a standard engine light .
Mention any made to the battery or transmission. smart p2403.40h
: A faulty leak detection pump or a break in the wiring to the sensor. Tell me your and engine type (Gas vs
: In generic OBD-II terms, this relates to an open circuit in the EVAP leak detection pump . smart p2403.40h
: This is a sub-code used by Mercedes-Benz/Smart internal systems (like STAR/Xentry). It often denotes a functional failure or a "signal defect".