Checking the connector

Fig 1: Engine Start Verification

Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 2: Identifying Connector(s) Reinstallation

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 status of the diagnostic trouble code (DTC) for the rear heated oxygen sensor (HO2S).

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

Other information
- For information about signals, see ELECTRICAL SYSTEM
- To access or replace the heated oxygen sensor (HO2S), see Heated oxygen sensor (HO2S), replacing
- See Checking wiring and terminals .
Fig 3: Identifying Heated Oxygen Sensor
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 4: Identifying VCT2000 Diagnostic Tool
Courtesy of VOLVO CARS OF NORTH AMERICA.

Fig 5: Identifying Rear Heated Oxygen Sensor
Courtesy of VOLVO CARS OF NORTH AMERICA.

Is "FAULT NOT DETECTED" displayed?