P0154moderate severityPowertrain
O2 Sensor Circuit No Activity Bank 2 Sensor 1
on 2000 Chevrolet Impala 3.4L V6 · FWD
What this code means
No switching activity from the upstream O2 sensor on Bank 2.
Symptoms
- Check Engine Light
- Poor fuel economy
Common causes
- Faulty sensor
- Heater failure
- Wiring open
Diagnostic steps
- Test sensor signal
- Check heater
- Inspect wiring
Repair notes
Replace O2 sensor.
Other Powertrain codes on this vehicle
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P0002
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P0010
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P0011
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P0012
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P0013
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P0014
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P0015
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