Exhaust System - DTC 20B811 Stored In AdBlue(R) Control Unit

Fault code 20B811 (The output for the heating element of the AdBlue delivery module has a short circuit to positive) is stored in the AdBlue control unit

Themen-Nummer LI49.20-P-053152

Version 1

Konstruktionsgruppe 49.20 Exhaust aftertreatment unit

Stand 08-08-2012





Gultigkeit

08-08-2012

Anderungsgrund

Beanstandung:
Engine diagnosis warning lamp lights up

Fault code 20B811 (The output for the heating element of the Ad Blue delivery module has a short circuit to positive) is stored in the AdBlue control unit

Ursache:
Due to excessively sensitive diagnostic routines a fault entry for the heating element of the Ad Blue delivery module may be logged during the warm-up phase at low outside temperatures.

Abhilfe:
Program BlueTec control unit (SCR) with new software

Note
The software is available with the following add-ons:

^ DVD 01/2012 - add-on 2274

^ DVD 03/2012 - add-on 2275

^ DVD 05/2012 add on 2306

If the fault code is still current even after programming the BlueTec control unit, process the test steps in XENTRY/Star Diagnosis for this fault code.





Symptome





Steuergerat/Fehlercode