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Engine Fault Code P0057

HO2S Heater Control Circuit Low Bank 2 Sensor 2

Care Engine Code Reader
The engine fault code P0057 refers to a problem with the heater control circuit for the oxygen sensor located on Bank 2, Sensor 2. Here`s a breakdown of what this means:

1. HO2S: This stands for Heated Oxygen Sensor. These sensors help monitor the exhaust gases to ensure the engine is running efficiently and cleanly.
2. Heater Control Circuit Low: This indicates that the voltage in the heater circuit is lower than expected. The heater in the oxygen sensor helps it reach operating temperature quickly, which is crucial for accurate readings.
3. Bank 2: This refers to the side of the engine that does not contain cylinder number one. In a V-engine, this is usually the side with the higher cylinder numbers.
4. Sensor 2: This is the oxygen sensor located after the catalytic converter, which monitors the efficiency of the catalytic converter.

Possible Causes:
– Faulty oxygen sensor
– Wiring issues (shorts or breaks) in the heater circuit
– Bad connectors or corrosion
– Issues with the engine control module (ECM)

Alternative Meanings by Manufacturer:
While P0057 generally has the same meaning across different manufacturers, some brands may have specific nuances or additional codes related to their systems. Here are a few examples:

1. Porsche: Similar interpretation, but specific diagnostic tools may provide additional data related to the vehicle`s performance.
2. Mini: The code may indicate a need for a software update or calibration after repairs.
3. Mercedes-Benz: May have additional codes that relate to the specific model or engine type, which could affect diagnostics.
4. Audi: Similar to VW group vehicles, additional codes may be present that provide further context.
5. Jaguar: The diagnosis might require specialized tools to access more detailed vehicle data.
6. Land Rover: Can have unique wiring harness issues due to off-road use, affecting sensor performance.

What to Do Next:
1. Visual Inspection: Check the wiring and connectors for damage or corrosion.
2. Test the Sensor: Use a multimeter to check the resistance of the heater circuit.
3. Scan for Codes: Use an OBD-II scanner to check for any additional codes that may help identify the issue.
4. Replace the Sensor: If the sensor is faulty, replacing it may resolve the issue.

If you`re not comfortable diagnosing or repairing the problem, its a good idea to take your vehicle to a professional mechanic.
The Engine Fault Code P0057 refers to a problem with the oxygen sensor heater control circuit for Bank 2, Sensor 2. This code is common across various manufacturers, including European brands like Porsche, Mini, Mercedes, Audi, Jaguar, and Land Rover. Here are some common causes:

1. Faulty Oxygen Sensor: The most common reason is that the oxygen sensor itself is malfunctioning. This could be due to age or damage.

2. Wiring Issues: Check for damaged or corroded wires in the heater circuit. A short circuit or an open circuit can lead to this code.

3. Poor Connections: Loose or corroded connectors can interrupt the electrical flow to the oxygen sensor heater.

4. Blown Fuse: In some cases, a blown fuse that protects the oxygen sensor heater circuit can cause this code.

5. ECU Problems: The Engine Control Unit (ECU) might have a fault that affects its ability to control the heater circuit properly.

6. Exhaust Leaks: Leaks in the exhaust system can sometimes lead to incorrect readings from the oxygen sensor, although this is less common for this specific code.

7. Voltage Issues: If the vehicle has a problem with its electrical system, such as low voltage or battery issues, it can affect the heater circuit.

Manufacturer Differences

Porsche: Specific wiring harness issues might be more prevalent due to the complexity of their systems.

Mini: Wiring and connector issues can be common, especially in older models.

Mercedes: Mercedes vehicles may have specific fuse locations that need to be checked, as well as more complex ECU programming.

Audi: Audi models may require a scan tool to reset the ECU after repairs.

Jaguar: Jaguar vehicles may have unique wiring configurations that could lead to this code.

Land Rover: Land Rover often has issues with electrical connections due to exposure to the elements, especially in off-road conditions.

If you encounter this code, its a good idea to start with a thorough inspection of the wiring and connectors, followed by testing or replacing the oxygen sensor if necessary. Always consult the vehicle`s service manual for specific troubleshooting steps related to your model.
The P0057 code indicates a problem with the heater control circuit for the oxygen sensor located in Bank 2, Sensor 2. This sensor is typically located after the catalytic converter and helps monitor the efficiency of the converter. Heres how to fix it, along with some manufacturer-specific notes:

General Steps to Fix P0057:

1. Check the Wiring and Connectors:
– Inspect the wiring harness and connectors for any damage, corrosion, or loose connections. Pay special attention to the wires leading to the oxygen sensor.

2. Test the Oxygen Sensor:
– Use a multimeter to check the resistance of the heater element in the sensor. The resistance should typically be around 10 to 30 ohms. If it`s out of this range, the sensor may need replacing.

3. Check the Fuse:
– Some vehicles have a dedicated fuse for the oxygen sensor heater circuit. Check the owner`s manual for the fuse box location and inspect the relevant fuse.

4. Inspect the PCM (Powertrain Control Module):
– If everything else checks out, there may be an issue with the PCM. This is less common but can happen. You may need a professional to diagnose this.

5. Replace the Oxygen Sensor:
– If the sensor is faulty, replace it with a new one. Make sure to use a part that meets OEM specifications.

6. Clear the Codes:
– After making repairs, use an OBD-II scanner to clear the fault codes and take the car for a test drive to see if the code returns.

Manufacturer-Specific Notes:

Porsche:
– On some models, the oxygen sensor may be integrated into the exhaust system. Ensure you have the correct part for your model year.

Mini:
– Mini models often have specific procedures for resetting the engine management system after replacing the sensor. Consult the service manual.

Mercedes:
– Mercedes vehicles may have a more complex wiring system. Use a wiring diagram specific to your model to trace the circuit.

Audi:
– Audi often uses more advanced diagnostics. If you have access to VAG-COM or similar software, use it to perform a more thorough check.

Jaguar:
– Some Jaguars may have a two-piece oxygen sensor. Ensure you replace the entire unit if its designed that way.

Land Rover:
– For Land Rover vehicles, the fault may also be related to the air-fuel mixture. Check for any vacuum leaks that could affect sensor readings.


Fixing the P0057 code involves checking the wiring, testing the sensor, and possibly replacing it. Always refer to your vehicle`s specific service manual for detailed instructions and specifications. If you`re not comfortable with electrical diagnostics, it may be best to consult a professional mechanic.
The P0057 code indicates a problem with the heated oxygen sensor (O2 sensor) circuit for Bank 2 Sensor 2. This sensor helps your engine control module (ECM) monitor the exhaust gases and adjust the air-fuel mixture for better performance and emissions.

Driving with this code can be safe in the short term, but it may lead to issues over time. Here are some considerations based on different manufacturers:

1. Porsche: If the warning light is on, its best to get it checked soon. Performance may be affected, but it may not cause immediate danger.

2. Mini: Similar to Porsche, driving is generally safe, but the engine may run less efficiently, leading to increased emissions and fuel consumption.

3. Mercedes: You can drive for a short period, but you should fix it soon. Ignoring it might lead to more serious engine problems.

4. Audi: Temporary driving is usually okay, but the longer you wait, the more likely it is to affect performance and emissions.

5. Jaguar: Driving is usually safe, but you may notice reduced fuel efficiency and performance issues over time.

6. Land Rover: It`s generally safe to drive, but you should address it to avoid potential long-term engine issues.

Our take, while you can drive with the P0057 code, its best to have it checked out soon. Ignoring it may lead to reduced performance and increased emissions, which can be problematic in the long run. Always consult your vehicle`s manual or a professional mechanic for the best advice specific to your car.

OBD Codes Explained

Engine Codes

P is for PowerTrain - Engine and Transmission.

P0 Indicates Generic Powertrain Codes

P0 Codes indicate problems with the powertrain and are common for all vehicles using the OBD-II Standard.

P1 Enhanced Manufacturer Specific Codes

P1 Codes are specific to manufacturers.

Sub-System

The 3rd Digit indicates the Sub-System

1 – Emission Management

2 – Injector Circuit

3 – Ignition

4 – Emission Control

5 – Vehicle Speed and Idle

6 – Computer and Output

7 – Transmission

8 – Transmission

9 – Reserved

0 – Reserved

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