Short circuit to ground on Pin 9 or 10. This usually kills the internal H-Bridge driver inside the Denoxtronic pump, requiring a full pump replacement.
The system uses to relay critical data such as AdBlue level and temperature back to the vehicle dashboard. Bosch Denoxtronic 2.2 Wiring Diagram
However, when this system fails, it often triggers a derate (limp mode) or a 5 mph speed limiter. Most of these failures are not pump failures—they are (corrosion, broken pins, chafed wires). Having a high-resolution Bosch Denoxtronic 2.2 wiring diagram is the only way to distinguish between a dead ECU, a bad sensor, or simple harness damage. Short circuit to ground on Pin 9 or 10
Contains the diaphragm pump, pressure sensor, and heating elements. Dosing Module (DM): However, when this system fails, it often triggers
Electronically controlled valve that sprays DEF into the exhaust stream.