Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means there's a problem with the heater part of the oxygen sensor on the car's exhaust system. It's like a small heater that helps the sensor work better, but it's not working right now.
The oxygen sensor heater helps the sensor reach its operating temperature quickly to provide accurate readings. If the heater circuit is malfunctioning, the sensor may not work correctly.
Oxygen sensors are used to measure the amount of oxygen in the exhaust gases. The heater circuit in the sensor is designed to bring the sensor to its operating temperature quickly. Code P0167 indicates that there is an issue with the heater circuit in the oxygen sensor located on Bank 2, Sensor 3. This can affect the sensor's ability to provide accurate data to the engine control module (ECM).
• Check Engine Light is on
• Poor fuel economy
• Increased emissions
• Blown fuse for the O2 sensor heater circuit
• Faulty oxygen sensor
• Damaged wiring or connectors in the heater circuit
OBD-II: On-Board Diagnostics, a system for self-diagnosing and reporting vehicle issues.
ECM: Engine Control Module, the computer that controls engine functions.
• Check the fuse for the O2 sensor heater circuit
• Inspect the wiring and connectors for damage
• Test the oxygen sensor heater resistance
• Replace the blown fuse
• Repair or replace damaged wiring or connectors
• Replace the faulty oxygen sensor
• Multimeter
• OBD-II scanner
• Basic hand tools
$150 - $300
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regular maintenance checks
• Inspect wiring for damage
• Replace oxygen sensors as recommended
Sensor Issue
• Have the vehicle inspected by a professional
• Avoid driving long distances until repaired
Check vehicle warranty for coverage on emissions-related components.
Oxygen sensor heater circuit issues have been common in vehicles with advanced emission control systems.
Moderate – It can affect fuel efficiency and emissions, but immediate repair is not critical unless symptoms worsen.
Driving with a malfunctioning oxygen sensor can lead to increased emissions, which may not comply with local environmental regulations.
• Engine at operating temperature
• Vehicle in a safe, well-ventilated area
Located in the exhaust system, typically after the catalytic converter on Bank 2.
Q: Can I drive with a P0167 code?
A: Yes, but it's not recommended for long periods as it can affect fuel economy and emissions.
Q: How can I prevent this code from appearing?
A: Regular maintenance and inspections can help prevent issues with the oxygen sensor heater circuit.
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Helpful for checking voltage drops, grounds, and basic circuit health when modules are not communicating.
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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.