Checking the connector

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

• Ignition off
• Check the heated oxygen sensor (HO2S) connector. Check for contact resistance and oxidation
• Reinstall the components, reconnect the connectors etc.
• Start the engine. Allow the engine to idle.

  Read off the diagnostic trouble code (DTC) status for the front heated oxygen sensor (HO2S).

  The text " NOT READY" is displayed if the diagnosis is running.

  Other information 

  • See Contents
  • To access or replace the heated oxygen sensor (HO2S), see Replacing lambda probes
  • For information about signals on 5 cylinder engines, see Signal specification or Signal specification
  Fig 2: Identifying Front Heated Oxygen Sensor Connector Terminals

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 3: Identifying VCT2000 Diagnostic Tool

  Courtesy of VOLVO CARS OF NORTH AMERICA.
  Fig 4: Identifying Front Heated Oxygen Sensor

  Courtesy of VOLVO CARS OF NORTH AMERICA.

Is "FAULT NOT DETECTED" displayed? 

• YES 

  OKAY:  Troubleshooting has been completed.

• NO 

  Refer to Checking components and wiring