Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's computer has detected a problem with the heater circuit of the second oxygen sensor on the side of the engine with cylinder number 2. It's like a small heater isn't working properly.
The oxygen sensor has a heater to help it work better when the engine is cold. This code indicates that the heater isn't working right on the second sensor on the second bank of the engine.
The P0057 code is triggered when the Engine Control Module (ECM) detects a low voltage in the heater control circuit of the heated oxygen sensor (HO2S) located on Bank 2, Sensor 2. This sensor is responsible for monitoring the efficiency of the catalytic converter by measuring the oxygen levels in the exhaust gases.
• Check Engine Light is on
• Increased emissions
• Poor fuel economy
• Failed emissions test
• Faulty oxygen sensor heater
• Blown fuse for the oxygen sensor heater circuit
• Wiring issues such as short circuits or open circuits
• Faulty Engine Control Module (ECM)
HO2S: Heated Oxygen Sensor
ECM: Engine Control Module
• Use an OBD-II scanner to confirm the code.
• Inspect the oxygen sensor wiring and connectors for damage.
• Check the fuse related to the oxygen sensor heater circuit.
• Test the oxygen sensor heater resistance with a multimeter.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Replace the blown fuse.
• Reprogram or replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Basic hand tools (screwdrivers, pliers)
$100 - $300
Moderate
• Toyota Camry
• Ford F-150
• Chevrolet Silverado
• Regular maintenance checks of the exhaust system.
• Timely replacement of oxygen sensors as recommended.
• Ensure wiring and connectors are in good condition.
Sensor Issue
• Avoid ignoring the Check Engine Light.
• Have the vehicle inspected by a professional if unsure.
• Consider regular diagnostic checks to prevent issues.
Oxygen sensors may be covered under the vehicle's emissions warranty. Check with the manufacturer.
Oxygen sensor heater circuit issues have been common in vehicles as they age, especially in models with high mileage.
Moderate – It's important to address this issue to maintain fuel efficiency and emissions compliance.
Driving with a faulty oxygen sensor can lead to increased emissions, which may not comply with local environmental laws.
• Engine must be at operating temperature.
• Ensure all electrical connections are secure.
The oxygen sensor is located in the exhaust system, typically after the catalytic converter on the side of the engine with cylinder number 2.
Q: Can I drive my car with a P0057 code?
A: While you can drive with this code, it is not recommended as it can lead to poor fuel economy and increased emissions.
Q: How do I know if my oxygen sensor is bad?
A: Symptoms include a Check Engine Light, poor fuel economy, and increased emissions. A diagnostic scan can confirm the issue.
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Fitment Required · Vehicle-fitment part
Relevant when the code or supporting diagnostics point toward upstream or downstream oxygen-sensor faults.
This code family often involves upstream or downstream oxygen-sensor diagnosis.
Verify exact sensor position and vehicle fitment before buying.
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Fitment Required · Vehicle-fitment part
Relevant when catalyst-efficiency or emissions faults persist after proper diagnosis.
Catalyst-efficiency faults sometimes point toward converter problems after proper testing.
Catalytic converters are highly vehicle-specific and should not be purchased by code alone.
View options on AmazonThese parts may be related to this fault category, but a code by itself does not confirm exact fitment or guarantee that replacing a part will solve the problem.