138206

What the Code Means

138206 is stored in DME memory when the lower flap of the active cooling system (AKKS) is detected as jammed at warm ambient temperature. The AKKS flaps control airflow through the radiators based on temperature — the DME monitors their position, and if the actual position doesn't match the commanded position under warmed-up conditions, a jam is logged. A Check Control message may appear or the MIL may illuminate.

Symptoms

• Check Control message on the instrument cluster;
• MIL (Malfunction Indicator Lamp) illuminated;
• code 138206 stored in the control unit memory.

Diagnosis and Repair

Step 1. DME Coding

According to the source, the working fix is to code/disable the air flaps in the DME under the AKKS section by setting the value to wert 0x00. This should clear the CEL.