P0140
O2 Sensor Circuit No Activity Detected Bank 1 Sensor 2
Generic code
Fuel and Air Metering
Medium severity
Moderate repair
Free on OBD DashX
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What P0140 means
- The fault code P0140 indicates that the circuit that controls the oxygen sensor for bank 1, sensor 2 is not detecting any activity. This may cause the engine to run poorly, produce excessive emissions, and may cause damage to the catalytic converter.
Possible symptoms
- Illuminated check engine light
- Poor engine performance
- Reduced fuel efficiency
- Excessive emissions
Possible causes
- Failed oxygen sensor
- Corroded or damaged wiring or connections in the circuit
- Failed engine control module (ECM)
- Exhaust leaks
Related parts
- Oxygen Sensor: This is one of the parts that fails very commonly. It measures the amount of oxygen to ensure proper combustion. Problems in the Oxygen Sensor lead to poor fuel economy
Possible solutions
- Replace the oxygen sensor
- Check and repair any damaged wiring or connections
- Inspect for and repair any exhaust leaks
- Replace the engine control module (ECM) if necessary
Free on OBD DashX
P0140 on OBD DashX
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