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 is getting a low signal from the oxygen sensor behind the engine on one side. It's like the sensor isn't talking to the computer properly.
The P0137 code indicates that the voltage signal from the oxygen sensor located after the catalytic converter on bank 1 is lower than expected.
The oxygen sensor (O2 sensor) measures the amount of oxygen in the exhaust gases and sends this information to the engine control module (ECM). Bank 1 Sensor 2 refers to the sensor located after the catalytic converter on the side of the engine with cylinder 1. A low voltage signal from this sensor indicates that the sensor is not detecting enough oxygen, which could be due to a malfunctioning sensor or an issue with the wiring or connectors.
• Check Engine Light is on
• Poor fuel economy
• Failed emissions test
• Faulty oxygen sensor
• Exhaust leak near sensor
• Wiring issues or poor electrical connections
Oxygen Sensor: A device that measures the amount of oxygen in the exhaust gases.
Catalytic Converter: A component that reduces harmful emissions from the engine.
• Use an OBD-II scanner to confirm the code.
• Inspect the wiring and connections to the oxygen sensor.
• Test the oxygen sensor's voltage output.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Fix any exhaust leaks near the sensor.
• OBD-II scanner
• Multimeter
• Wrench set
$100 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain exhaust system.
• Ensure proper electrical connections.
• Use high-quality fuel to reduce contaminants.
Sensor Issue
• Address the issue promptly to avoid further damage.
• Consult a professional if unsure about repairs.
Oxygen sensors may be covered under emissions warranty.
P0137 has been a common code for vehicles with aging oxygen sensors or exhaust system issues.
Moderate – Should be addressed soon to avoid increased emissions and fuel consumption.
Driving with a faulty oxygen sensor can increase emissions and may be illegal in some areas.
• Engine at operating temperature
• Vehicle in closed-loop mode
The oxygen sensor is located on the exhaust pipe after the catalytic converter on the side of the engine with cylinder 1.
Q: Can I drive with a P0137 code?
A: It's possible to drive, but it's not recommended as it can lead to increased emissions and poor fuel economy.
Q: How do I know if my oxygen sensor is bad?
A: Symptoms include a check engine light, poor fuel economy, and a failed emissions test.
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Universal · Digital multimeter
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Useful when diagnosis points toward damaged wiring, corroded terminals, or connector repairs.
Useful if diagnosis points toward damaged connectors, wiring, or terminal repairs.
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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.