Check Mixer SCR Exhaust Emission System: Notes
An incorrectly installed mixer cannot distribute the dosed AdBlue in the exhaust pipe properly so that a complete conversion of nitrogen oxide can occur. The conversion of the nitrogen oxide is monitored by the nitrogen oxide sensors. The corresponding fault memories are entered.
Check whether the retaining claws of the mixer point in the correct direction. Observe repair instructions.
NOTE:
After replacing the mixer, the adaptations of the nitrogen oxide sensors must be deleted.
| E90 | Retaining claws of the mixer point opposite to the direction of travel , in the direction of the flow of exhaust gas |
| E70 | Retaining claws of the mixer point in the direction of travel , opposite to the direction of the flow of exhaust gas |
Overview mixer E90 and E70
| Item | Explanation |
|---|---|
| 1 | Retaining claws |
| 2 | Mixer E90 (installed opposite to the direction of travel, direction exhaust gas flow) |
| 3 | Mixer E70 (installed to the direction of travel, opposite to direction of exhaust gas flow) |