P0159
O2 Sensor Circuit Slow Response Bank 2 Sensor 2
Generic code
Fuel and Air Metering
Medium severity
Moderate repair
Free on OBD DashX
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What P0159 means
- The fault code P0159 indicates that there is a problem with the circuit that controls the oxygen sensor for bank 2, sensor 2. This may cause the engine to run poorly or not start at all.
Possible symptoms
- Illuminated check engine light
- Poor engine performance
- Increased fuel consumption
- Reduced engine power or acceleration
Possible causes
- Failed oxygen sensor
- Damaged or faulty wiring or connections in the circuit
- Exhaust leaks
- Vacuum leaks
- Failed engine control module (ECM)
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
- Repair any exhaust leaks
- Repair any vacuum leaks
- Replace the engine control module (ECM) if necessary
Free on OBD DashX
P0159 on OBD DashX
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