Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Transmission Unit

Courtesy of VOLVO CARS OF NORTH AMERICA.

Diagnostic trouble code (DTC) TCM-0100 is stored if the transmission control module (TCM) registers that the quality of gearshifts in the transmission is too low.

Substitute Value 

• The transmission control module (TCM) "Emergency mode I" program has been initiated.

Possible Source 

• Mechanical fault in the transmission.
• Hydraulic fault in the transmission.

Fault symptom[s] 

• General orange warning lamp lit.