Powertrain
generic / SAE
P0151
O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1)
Same condition as P0131 but on bank 2. The upstream sensor sees a continuously lean exhaust on bank 2 or has a signal short to ground.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number1 / 51
Possible causes
- Exhaust leak upstream of the sensor high
- Bank 2 running lean (vacuum leak, fuel pressure) medium
- Connector pins corroded - high contact resistance low
Symptoms
- Check engine light on
- Increased fuel consumption
- Possible rough idle or hesitation
- Failed emissions test
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 60–400 €
- Estimated time: 0.5–3 h
- Component: oxygen sensor upstream
- Component: exhaust pipe pre cat
- MIL / check engine light
- emissions-relevant
- drive cycle required
Sources
References
sae:J2012