What does code P0056 mean?

HO2S Heater Control Circuit (Bank 2, Sensor 2): The HO2S heater control circuit on bank 2, sensor 2 has a fault.

P0056 is rated as low severity. Minor issue — monitor and fix at convenience.

P0056

HO2S Heater Control Circuit (Bank 2, Sensor 2)

Powertrain Code · Low

What does P0056 mean?

The HO2S heater control circuit on bank 2, sensor 2 has a fault.

System: O2 Sensor

P0056 is a powertrain diagnostic trouble code indicating ho2s heater control circuit (bank 2, sensor 2). This code is classified as low severity, which means: minor issue — monitor and fix at convenience.

Diagnostic data on this page is compiled from publicly available repair resources and technical service bulletins. Always have a qualified mechanic confirm the diagnosis before authorizing repairs on your vehicle.