Checking the connector
- 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 .
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