Diagnostic trouble code (DTC) status ECM-1200, Intake air temperature (IAT) sensor. Signal too high

Reading off diagnostic trouble code (DTC) status ECM-1200 

• NOTE:

  When reading off the diagnostic trouble code (DTC) status, other stored diagnostic trouble codes (DTCs) and their status will be listed.

• 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 Signal too high. Intermittent fault