What is an OBD2 code?

An OBD2 (On-Board Diagnostics) code is a diagnostic trouble code (DTC) generated by your vehicle's computer system when it detects a problem. These codes help identify specific issues with your vehicle's engine, transmission, emissions, or other systems.

How do I read OBD2 codes?

To read OBD2 codes, you'll need an OBD2 scanner. Plug it into your vehicle's OBD2 port (usually located under the dashboard), turn your key to the 'ON' position, and follow your scanner's instructions to retrieve the codes. Each code starts with a letter (P, B, C, or U) followed by four numbers.

What do the different types of OBD2 codes mean?

OBD2 codes are categorized by their first letter: P (Powertrain) for engine and transmission issues, B (Body) for interior systems like airbags, C (Chassis) for mechanical systems like brakes, and U (Network) for computer and module communication problems.

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Home » OBD2 Codes » P0061

Code P0061

Symptoms

• Check Engine Light illuminated

• Poor fuel economy

• Failed emissions test

Common Causes

• Faulty oxygen sensor

• Wiring issues such as open or short circuits

• Blown fuse for the oxygen sensor heater circuit

Glossary

HO2S: Heated Oxygen Sensor

ECM: Engine Control Module

Related Codes

• P0050

• P0051

Official description

HO2S Heater Resistance Bank 2 Sensor 3

Laymans terms

This code means there's a problem with the heater in one of the oxygen sensors in your car. It's like a tiny heater that helps the sensor work properly, and it's not working right now.

Explanation

The P0061 code indicates a problem with the heater circuit in the oxygen sensor located in Bank 2, Sensor 3. This sensor helps the car's computer monitor the exhaust gases to ensure the engine is running efficiently.

Technical description

The Heated Oxygen Sensor (HO2S) has an internal heater to help it reach operating temperature quickly. The P0061 code is triggered when the Engine Control Module (ECM) detects that the resistance in the heater circuit of the oxygen sensor in Bank 2, Sensor 3 is outside the expected range.

Diagnosis steps

• Use an OBD-II scanner to confirm the code.

• Inspect the wiring and connections to the oxygen sensor.

• Test the resistance of the oxygen sensor heater circuit.

Repair procedures

• Replace the faulty oxygen sensor.

• Repair or replace damaged wiring or connectors.

• Replace any blown fuses associated with the heater circuit.

Tools required

• OBD-II scanner

• Multimeter

• Wrench set

Estimated repair cost

$100 - $300

Difficulty level

Moderate

Commonly affected vehicles

• Toyota Camry

• Ford F-150

• Honda Accord

Preventive measures

• Regular maintenance checks

• Ensure proper wiring connections

• Replace sensors at recommended intervals

Error code type

Sensor Issue

User experience recommendations

• Do not ignore the Check Engine Light.

• Get the vehicle inspected by a professional if unsure.

Warranty information

Check with the vehicle manufacturer for warranty coverage on emissions-related components.

Historical data

This code has been associated with sensor heater failures, often due to age or poor electrical connections.

Urgency level

Moderate – While the vehicle may still run, ignoring it can lead to increased emissions and reduced fuel efficiency.

Legal and safety notice

Driving with a malfunctioning oxygen sensor can lead to increased emissions, which may not comply with local environmental laws.

Testing conditions

• Engine at operating temperature

• Use of a multimeter to test sensor resistance

Component location

The oxygen sensor is located in the exhaust system, typically after the catalytic converter on Bank 2.

FAQs

Q: What does Bank 2 mean?
A: Bank 2 refers to the side of the engine that does not contain cylinder 1.

Q: Can I drive with a P0061 code?
A: It's possible to drive, but it's not recommended as it can lead to poor fuel economy and increased emissions.

Last updated: Oct 6, 2025 • Source: internal database

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