W/Harness Inspection

P0140 O2 Sensor Circuit No Activity Detected (Bank 1 / Sensor 2)

Inspection/Repair - W/Harness Inspection

Terminal and Connector Inspection

1. Ignition "ON" & Engine "OFF"
2. Monitor the HO2S SNSR VOL.-B1/S2 parameter on the GDSdata list while wiggling the wiring harness and related connectors. Refer to "Signal Waveform & Data" in the "General Information" procedure.
3. 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 sensor 2 fuse.
'- Check front and rear HO2S for connections being reversed.
4. Was a problem found in any of the above areas?