P0155
O2 Sensor Heater Circuit Bank 2 Sensor 1
1999-2000 BMW 323i E46 2.5L I6 🇬🇧
Low SeverityPowertrain
Description
Malfunction in the upstream O2 sensor heater on Bank 2.
Symptoms
- Check Engine Light
- Extended warmup emissions
Common Causes
- Faulty heater
- Blown fuse
- Wiring issue
Diagnostic Steps
- Check fuse
- Test heater resistance
- Inspect wiring
Repair Notes
Replace O2 sensor.
Related Codes
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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
P0155 on Other Vehicles
Common Questions
What does code P0155 mean on a 1999-2000 BMW 323i E46?
P0155 stands for "O2 Sensor Heater Circuit Bank 2 Sensor 1". Malfunction in the upstream O2 sensor heater on Bank 2.
What are the symptoms of P0155 on a BMW 323i E46?
Common symptoms of P0155 include: Check Engine Light, Extended warmup emissions.
What causes P0155 on a 1999-2000 BMW 323i E46?
Common causes of P0155 include: Faulty heater, Blown fuse, Wiring issue.