Ignition "ON" & Engine "OFF"
Monitor the O2 SNSR VOL.-B1/S1 parameter on the GDSdata list while wiggling the wiring harness and related connectors.
The value should remain more or less unchanged. If not, check for the following conditions :
- Check for corrosion on terminals
- Check for terminal tension ( at the HO2S and at the PCM)
- Check for damaged wiring
- Check the HO2S ground circuit for a good connection
- Check the 15A sensor2 fuse
- Check front and rear HO2S for connections being reversed.
Was a problem found in any of the above areas?
![]() | ▶ Repair as necessary and go to "Verification of Vehicle Repair" procedure |
![]() | ▶ Go to next step as below |