Diagnostic trouble code (DTC) information

Condition 

Fig 1: Identifying Engine Control Module

Courtesy of VOLVO CARS OF NORTH AMERICA.

The engine control module (ECM) has a detected an internal temperature of 90° C.

Substitute Value 

The engine coolant fan starts at low speed.

Possible Source 

• high output temperature
• blocked air intake to the control module box
• the car has been in a varnishing furnace.

Fault symptom[s] 

None.