P0151
O2 Sensor Circuit Low Voltage Bank 2 Sensor 1
Generic code
Fuel and Air Metering
Medium severity
Moderate repair
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What P0151 means
- The fault code P0151 indicates that the voltage of the oxygen sensor circuit in bank 2, sensor 1 is lower than expected. This may cause issues with the engine's fuel efficiency and emissions performance.
Possible symptoms
- Decreased fuel efficiency
- Illuminated check engine light
- Poor engine performance
- Failed emissions test
Possible causes
- Faulty oxygen sensor
- Damaged or corroded wiring or connections in the oxygen sensor circuit
- Malfunctioning 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 faulty oxygen sensor
- Check and repair any damaged or corroded wiring or connections in the oxygen sensor circuit
- Replace the engine control module (ECM) if necessary
- Repair any exhaust leaks
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P0151 on OBD DashX
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