P0140 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2) - DTC Chart

P0140 - O2 SENSOR CIRCUIT NO ACTIVITY DETECTED (BANK 1 SENSOR 2) - DTC CHART

Description: The nitrogen oxides bank 1, sensor 2 (NOx12) module monitors the NOx12 sensor oxygen (O2) signal for a lack of movement concern. This DTC sets when the actual O2 signal value does not change from the default O2 signal value.
Possible Causes: Corrosion Incorrect connections Radio frequency interference or electromagnetic interference Contaminated NOx12 sensor Damaged NOx12 sensor
Diagnostic Aids:
Application	Key On Engine Off	Key On Engine Running	Continuous Memory
All	GO to Pinpoint Test RD .