AutoCodes – Generic – P0057

P0057 Code - HO2S Heater Control Circuit Low Bank 2 Sensor 2

Quick Answer

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2, Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 2 circuit poor electrical connection. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P0057 indicates HO2S Heater Control Circuit Low Bank 2 Sensor 2.
Common causes: Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2, Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 2 circuit poor electrical connection.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 59,348

How popular is this code, among other codes? Medium

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 23, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0057 Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects a short to ground in the heater output low side driver circuit of the heated oxygen sensor when the heater is commanded OFF for greater than 5 s.

OBDII Code P0057 - HO2S Heater Control Circuit Low Bank 2 Sensor 2 - AutoCodes.com — P0057 Code - HO2S Heater Control Circuit Low Bank 2 Sensor 2

What does this mean?

What are the Possible Causes of the DTC P0057?

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

How to Fix the DTC P0057?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is set when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the fuse and connector are OK, replacing the O2 Sensor usually takes care of the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0057 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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Information for Specific Makes

P0057 Audi — HO2S Heater Control Circuit Low Bank 2 Sensor 2
P0057 BMW — HO2S 22 Heater Control Circuit Low
P0057 Buick — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 Cadillac — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 Chevrolet — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 Chrysler — O2 Sensor 2/2 Heater Circuit Low
P0057 Dodge — O2 Sensor 2/2 Heater Circuit Low
P0057 GMC — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 Hyundai — HO2S 22 Heater Circuit Low
P0057 Infiniti — HO2S22 Heater Control Circuit Low
P0057 Jeep — O2 Sensor 2/2 Heater Circuit Low
P0057 KIA — HO2S 22 Hater Circuit Low Input
P0057 Lexus — Oxygen Sensor Heater Control Circuit Low Bank 2 Sensor 2
P0057 Mazda — HO2S Heater Control Circuit Low Bank 2 Sensor 2
P0057 Mercedes-Benz — HO2S Heater Control Circuit Low Bank 2 Sensor 2
P0057 MINI — HO2S 22 Heater Control Circuit Low
P0057 Mitsubishi — Cylinder 2-3 Heated Oxygen Sensor Rear Heater Control Circuit Low
P0057 Nissan — HO2S22 Heater Control Circuit Low
P0057 Pontiac — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 Saturn — HO2S Heater Control Circuit Low Voltage Bank 2 Sensor 2
P0057 Scion — Oxygen Sensor Heater Control Circuit Low Bank 2 Sensor 2
P0057 Subaru — HO2S22 Heater Control Circuit Low
P0057 Suzuki — HO2S22 Heater Control Circuit Low
P0057 Toyota — Oxygen Sensor Heater Control Circuit Low Bank 2 Sensor 2
P0057 Volkswagen — HO2S Heater Control Circuit Low Bank 2 Sensor 2

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0057 Code

1. What does the OBDII code P0057 mean?

P0057 indicates an issue with the HO2S (Heated Oxygen Sensor) heater control circuit on Bank 2, Sensor 2, where the voltage is lower than expected.

2. What are the symptoms of a P0057 code?

Symptoms may include an illuminated Check Engine Light, decreased fuel efficiency, and, in some cases, a failed emissions test.

3. What causes the P0057 code to appear?

Common causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or a malfunctioning PCM (Powertrain Control Module).

4. Can I drive with a P0057 code?

While your vehicle may still be drivable, ignoring this code can lead to poor fuel economy and increased emissions. Itâ€™s best to address the issue promptly.

5. How do I diagnose a P0057 code?

Start by inspecting the wiring and connectors for damage or corrosion, check the fuse for the O2 sensor heater circuit, and test the oxygen sensor for proper resistance.

6. How do I fix a P0057 code?

Repairs may involve replacing the faulty oxygen sensor, repairing or replacing damaged wiring, or replacing a blown fuse. In rare cases, the PCM may need reprogramming or replacement.

7. Is the P0057 code specific to any vehicle?

No, P0057 is a generic OBDII code and can appear on any vehicle equipped with OBDII systems, though the exact repair steps may vary by make and model.

8. What tools do I need to fix a P0057 code?

Tools may include a multimeter, an OBDII scanner, basic hand tools, and possibly a wiring diagram for your specific vehicle.

9. How much does it cost to repair a P0057 code?

The cost depends on the root cause; replacing an oxygen sensor typically costs $150â€“$300, while repairing wiring or fuses may be less expensive.

10. What is Bank 2, Sensor 2 in the P0057 code?

Bank 2 refers to the side of the engine opposite Bank 1 (usually the side without cylinder 1), and Sensor 2 is the downstream oxygen sensor located after the catalytic converter.