Diagnostic trouble code (DTC) status ECM-2200, Rear heated oxygen sensor (HO2S), control. Signal too low

Read off the diagnostic trouble code (DTC) status. Check the status of the relevant diagnostic trouble code (DTC).

Fig 1: Identifying VCT2000 Diagnostic Tool

Courtesy of VOLVO CARS OF NORTH AMERICA.

Was the status of the relevant diagnostic trouble code (DTC) permanent? 

• YES 

  Refer to Checking the connector 

• NO 

  Refer to Checking wiring