P0056
HO2S Heater Control Circuit Bank 2 Sensor 2
2006-2011 BMW 325i 3.0L I6 N52 🇨🇦
Low SeverityPowertrain
Description
Malfunction in the heater circuit for the downstream O2 sensor on Bank 2.
Symptoms
- Check Engine Light
- Failed emissions
- Poor catalyst monitoring
Common Causes
- Faulty sensor heater
- Blown fuse
- Wiring issue
Diagnostic Steps
- Check fuse
- Test heater resistance
- Inspect wiring
Repair Notes
Replace O2 sensor or repair wiring.
Related Codes
Other Powertrain Codes
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- P0003Fuel Volume Regulator Control Circuit Low
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- P0010Intake Camshaft Position Actuator Circuit/Open Bank 1
- P0011Intake Camshaft Position Timing Over-Advanced Bank 1
- P0012Intake Camshaft Position Timing Over-Retarded Bank 1
- P0013Exhaust Camshaft Position Actuator Circuit/Open Bank 1
- P0014Exhaust Camshaft Position Timing Over-Advanced Bank 1
- P0015Exhaust Camshaft Position Timing Over-Retarded Bank 1
P0056 on Other Vehicles
Common Questions
What does code P0056 mean on a 2006-2011 BMW 325i?
P0056 stands for "HO2S Heater Control Circuit Bank 2 Sensor 2". Malfunction in the heater circuit for the downstream O2 sensor on Bank 2.
What are the symptoms of P0056 on a BMW 325i?
Common symptoms of P0056 include: Check Engine Light, Failed emissions, Poor catalyst monitoring.
What causes P0056 on a 2006-2011 BMW 325i?
Common causes of P0056 include: Faulty sensor heater, Blown fuse, Wiring issue.