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 in one of the car's oxygen sensors. It's like a tiny heater that helps the sensor work better, and it's not working right now.
The code P0059 indicates an issue with the heater circuit resistance in the oxygen sensor located in Bank 2, Sensor 1. This sensor is responsible for measuring the oxygen level in the exhaust gases.
The oxygen sensor heater helps bring the sensor up to operating temperature quickly. The engine control module (ECM) monitors the heater circuit for resistance. If the resistance is outside the expected range, the ECM triggers the P0059 code.
• Check Engine Light is on
• Increased fuel consumption
• Poor engine performance
• Rough idle
• Faulty oxygen sensor
• Open or short in the heater circuit wiring
• Poor electrical connection at the oxygen sensor
• Blown fuse
• Faulty ECM
HO2S: Heated Oxygen Sensor
ECM: Engine Control Module
• Use an OBD-II scanner to verify the code.
• Inspect the oxygen sensor wiring and connectors for damage.
• Check the fuse related to the oxygen sensor heater circuit.
• Measure the resistance of the oxygen sensor heater circuit.
• Replace the faulty oxygen sensor.
• Repair or replace damaged wiring or connectors.
• Replace a blown fuse.
• Inspect and possibly replace the ECM if necessary.
• OBD-II scanner
• Multimeter
• Wrench set
$150 - $400
Moderate
• Toyota Camry
• Honda Accord
• Ford F-150
• Regularly inspect and maintain oxygen sensor wiring.
• Ensure proper electrical connections.
• Perform regular vehicle diagnostics.
Sensor Issue
• Avoid driving long distances until the issue is fixed.
• Get the vehicle checked by a professional mechanic.
Oxygen sensors may be covered under the vehicle's emissions warranty.
Oxygen sensor heater issues have been common in vehicles, especially as they age.
Moderate – It should be addressed soon to avoid further engine performance issues.
Driving with a faulty oxygen sensor can lead to increased emissions and may not comply with emissions regulations.
• Engine at operating temperature
• Vehicle in a safe, stationary position
The oxygen sensor is located in the exhaust system, typically near the catalytic converter on Bank 2.
Q: Can I drive with a P0059 code?
A: It's possible to drive short distances, but it's best to fix the issue soon to avoid further problems.
Q: How do I know if my oxygen sensor is bad?
A: Common signs include a check engine light, poor fuel economy, and rough engine performance.
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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.