Possible causes

– Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 harness is open shorted
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit poor electrical connection
– Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2 circuit fuse
– Faulty Engine Control Module (ECM)

Tech notes

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. Water getting inside the heated oxygen sensor connector can caused the heated oxygen sensor fuse to blow, which is a very common problem for this type codes. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors.

When is the code detected?

The P0057 is set when the ECM detects an excessively low voltage through the heated oxygen sensor heater circuit

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P0057 Description

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.

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P0057 Information for specific makes

P0057 AUDI
P0057 BMW
P0057 CHRYSLER
P0057 DODGE
P0057 HYUNDAI
P0057 INFINITI
P0057 JEEP
P0057 KIA
P0057 LEXUS
P0057 MAZDA
P0057 MITSUBISHI
P0057 NISSAN
P0057 SCION
P0057 SUBARU
P0057 SUZUKI
P0057 TOYOTA
P0057 VOLKSWAGEN