P0051
HO2S Heater Control Circuit Low Bank 2 Sensor 1
1999-2000 BMW 323i E46 2.5L I6
Low SeverityPowertrainGeneric (SAE)
Description
Low voltage in the Bank 2 Sensor 1 O2 heater circuit.
Symptoms
- Check Engine Light
- Extended warmup emissions
Common Causes
- Short to ground
- Faulty sensor
- Corroded connector
Diagnostic Steps
- Test voltage
- Check for shorts
- Test resistance
Repair Notes
Repair or replace sensor.
Related Codes
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P0051 on Other Vehicles
Common Questions
What does code P0051 mean on a 1999-2000 BMW 323i E46?
P0051 stands for "HO2S Heater Control Circuit Low Bank 2 Sensor 1". Low voltage in the Bank 2 Sensor 1 O2 heater circuit.
What are the symptoms of P0051 on a BMW 323i E46?
Common symptoms of P0051 include: Check Engine Light, Extended warmup emissions.
What causes P0051 on a 1999-2000 BMW 323i E46?
Common causes of P0051 include: Short to ground, Faulty sensor, Corroded connector.