: Reduced power to prevent further mechanical damage.
: 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". smart p2403.40h
: 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 : Reduced power to prevent further mechanical damage
: A faulty leak detection pump or a break in the wiring to the sensor. : On many Smart diesel or older gasoline
In many Smart-specific cases, P2403.40h points to a or a failure in the clutch actuator.
Tell me your and engine type (Gas vs. Diesel). Share if you see three bars or a standard engine light .
If your Smart is throwing the P2403.40h code, you might notice: