Smart P2403.40h Guide

This code triggers when the engine control module (ECM) detects an open circuit or "implausible signal" from the sensor that monitors your leak detection pump (LDP). Primary Meaning: EVAP System Leak Detection Pump Sense Circuit/Open. Sub-code (.40h):

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Since this involves the EVAP system, which controls pollutants, a mobile mechanic or certified technician is often needed to perform a full Check Engine Light diagnostic Could you clarify if you are seeing this code on a specific car model (e.g., Mercedes, Volvo) or a particular diagnostic tool This code triggers when the engine control module