P0155 — O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)

What it means

P0155 is an OBD-II diagnostic trouble code: O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1).

Typical fix

Confirm the code with an OBD-II scanner, then inspect the component or circuit named above. Consult a vehicle-specific service manual for the full diagnostic and repair procedure.