P0155
P0155 means "O2 Sensor Heater Circuit (Bank 2 Sensor 1)". Severity: 🟡 Moderate. You can often drive short distances, but address it promptly to avoid further damage.
What the P0155 code means
| Code | P0155 |
| Definition | O2 Sensor Heater Circuit (Bank 2 Sensor 1) |
| System | Powertrain (engine & transmission) |
| Type | Generic (SAE standard) |
| Subsystem | Fuel & Air Metering |
| Severity | 🟡 Moderate |
Common causes of P0155
- Failed O2 heater
- Fuse/wiring fault
How to fix P0155
- Replace bank 2 O2 sensor
- Check fuse and wiring
Always confirm the diagnosis with a scan tool and live data before replacing parts.
Is it safe to drive with P0155?
You can often drive short distances, but address it promptly to avoid further damage.
P0155, answered.
What does P0155 mean?
P0155 stands for "O2 Sensor Heater Circuit (Bank 2 Sensor 1)". It is a generic (sae standard) OBD-II powertrain trouble code.
Is it safe to drive with a P0155 code?
You can often drive short distances, but address it promptly to avoid further damage.
What causes P0155?
Common causes include: Failed O2 heater; Fuse/wiring fault.
How do you fix P0155?
Typical fixes: Replace bank 2 O2 sensor; Check fuse and wiring. Always confirm the diagnosis before replacing parts.