P0056

Severity medium

AUTO

The engine control module has detected a problem with the heater circuit for the downstream oxygen sensor on bank 2, sensor 2. The heater is

OBD-II scanner plugged into a car diagnostic port showing a trouble code
OBD-II codes: read the code, test the component, clear it and re-check.

What it means

The engine control module has detected a problem with the heater circuit for the downstream oxygen sensor on bank 2, sensor 2.

How to fix P0056

  1. Visual inspection of wiring and connectors
  2. Scan tool live data check
  3. Heater circuit voltage test

Related errors

P0030P0125P0137P0300P0301P0302P0303P0304

Source: open OBD-II DTC database

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