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
- For information about signals:
  - For 6 cylinder engines -2001, see Signal specification
  - For 6 cylinder engines 2002-, see Signal specification
  - For 6 cylinder engines -2004, see Signal specification
  - For 6 cylinder engines 2005-, see Signal specification .
- To access or replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing
- See Contents
Fig 2: Identifying Front Heated Oxygen Sensor Connector Terminals
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 3: Identifying VCT2000 Diagnostic Tool Symbol In VIDA
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?