P0140moderate severityPowertrain
O2 Sensor Circuit No Activity Bank 1 Sensor 2
on 2002 Ford Explorer 4.0L V6 SOHC · 4WD
What this code means
The downstream O2 sensor on Bank 1 shows no switching activity.
Symptoms
- Check Engine Light
- No catalyst monitoring
Common causes
- Faulty sensor
- Heater circuit failure
- Wiring open
Diagnostic steps
- Test sensor voltage
- Check heater
- Inspect wiring
Repair notes
Replace downstream O2 sensor.
Other Powertrain codes on this vehicle
P0001
Fuel Volume Regulator Control Circuit/Open
P0001
Fuel Volume Regulator Control Circuit/Open
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0002
Fuel Volume Regulator Control Circuit Range/Performance
P0003
Fuel Volume Regulator Control Circuit Low
P0003
Fuel Volume Regulator Control Circuit Low
P0004
Fuel Volume Regulator Control Circuit High
P0004
Fuel Volume Regulator Control Circuit High
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1
P0010
Intake Camshaft Position Actuator Circuit/Open Bank 1