Smart P2403.40h -

Mention any made to the battery or transmission.

: Reduced power to prevent further mechanical damage.

If your Smart is throwing the P2403.40h code, you might notice: 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".

: Frayed wires near the gearbox or a failing Ground (GND) connection . Mention any made to the battery or transmission

: The "Check Engine" light or the infamous three bars appearing in the gear indicator.

: In generic OBD-II terms, this relates to an open circuit in the EVAP leak detection pump . It often denotes a functional failure or a "signal defect"

I can then provide more targeted steps for your specific vehicle. Códigos de avería Smart (motores diesel). - DTC

: On many Smart diesel or older gasoline models, users report this code alongside transmission "limp mode," where the car may show three horizontal bars on the dash and refuse to shift. Common Symptoms

Automotive diagnostics use complex strings to pinpoint exact failures. Here is what this specific sequence usually means for a Smart owner: