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 diagnostic is still running.

Other information
- To access or replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing
- For information about signals on 5 cylinder engines, see Signal description or Signal specification
- See Contents .
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?