Home › Volvo › 2003 › C70 2.3 53, Standard › Repair and Diagnosis › Transmission › Automatic Trans › Transmission Control Module (TCM) Diagnostic Trouble Code (DTC) Diagnostics - 2 Of 3 (Convertible) › TCM-0048 Control Module. Faulty Software (Aw55-50/51SN;2001-2004) › Faulty software