What's the p1434 BMW code?

A faulty diagnostic module tank leakage is what the p1434 BMW code means. Originally developed by Bosch in the late 1990s, the name of the device translates as diagnostic module for tank leakage, or DMTL. It consists of a small vane-type air pump on a 12-volt electric motor and a solenoid-operated switching valve with a reference orifice.The DMTL is a complete assembly that includes the air pump, switching valve, reference orifice, and heater, all in one housing. A separate air filter outside the housing is often mounted in a remote location and connected by a hose.