P0059 Code - HO2S Heater Resistance Bank 2 Sensor 1
Quick Answer
The diagnostic trouble code P0059 stands for "HO2S Heater Resistance Bank 2 Sensor 1." This code is triggered when there is an issue with the oxygen sensor (O2 sensor) heater circuit for the second bank of the engine, which is typically associated with the side of the engine that does not contain cylinder 1. Common causes include Faulty Oxygen Sensor Heater: The most common cause of the P0059 code is a malfunctioning oxygen sensor heater itself, Wiring Issues: Damaged or corroded wiring connections can disrupt the flow of electricity to the oxygen sensor heater, Blown Fuse: A blown fuse in the oxygen sensor heater circuit can prevent the heater from functioning correctly. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0059 indicates HO2S Heater Resistance Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty Oxygen Sensor Heater: The most common cause of the P0059 code is a malfunctioning oxygen sensor heater itself, Wiring Issues: Damaged or corroded wiring connections can disrupt the flow of electricity to the oxygen sensor heater, Blown Fuse: A blown fuse in the oxygen sensor heater circuit can prevent the heater from functioning correctly.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P0059 Description
The diagnostic trouble code P0059 stands for "HO2S Heater Resistance Bank 2 Sensor 1." This code is triggered when there is an issue with the oxygen sensor (O2 sensor) heater circuit for the second bank of the engine, which is typically associated with the side of the engine that does not contain cylinder 1. The O2 sensor plays a crucial role in monitoring the oxygen levels in the exhaust gases to help the engine control module (ECM) adjust the air-fuel mixture for optimal combustion efficiency. The O2 sensor heater is responsible for quickly bringing the sensor up to operating temperature for accurate readings.
Common Causes of P0059
- Faulty Oxygen Sensor Heater: The most common cause of the P0059 code is a malfunctioning oxygen sensor heater itself.
- Wiring Issues: Damaged or corroded wiring connections can disrupt the flow of electricity to the oxygen sensor heater.
- Blown Fuse: A blown fuse in the oxygen sensor heater circuit can prevent the heater from functioning correctly.
- ECM Malfunction: A malfunction in the engine control module (ECM) can also trigger the P0059 code.
Symptoms of P0059
- Check Engine Light: The most common symptom associated with the P0059 code is the illumination of the check engine light on the vehicle's dashboard.
- Decreased Fuel Efficiency: A malfunctioning oxygen sensor heater can lead to inaccurate readings, resulting in decreased fuel efficiency.
- Rough Idle: The engine may experience rough idling or fluctuating RPMs due to improper air-fuel mixture adjustments.
- Poor Acceleration: The vehicle may struggle with acceleration or have a lack of power when driving.
- Increased Emissions: A faulty oxygen sensor heater can lead to increased emissions being released by the vehicle.
How to Fix P0059
- Diagnose the Issue: Use an OBD-II scanner to retrieve the trouble code and determine the specific cause of the problem.
- Inspect Wiring and Connections: Check the wiring and connections related to the oxygen sensor heater for any signs of damage or corrosion.
- Test Oxygen Sensor Heater: Test the oxygen sensor heater to verify if it is functioning correctly.
- Replace Oxygen Sensor Heater: If the oxygen sensor heater is faulty, replace it with a new one to resolve the issue.
- Clear Codes and Test Drive: After making the necessary repairs, clear the trouble codes from the ECM and test drive the vehicle to ensure the problem has been resolved.
Cost to Fix P0059
The typical repair costs for addressing the P0059 code can vary depending on the specific cause of the issue. On average, the cost of replacing the oxygen sensor heater can range from $200 to $400, including parts and labor. However, the total cost may be higher if other components need to be replaced or if additional diagnostics are required. Keep in mind that labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. It is advisable to consult with a professional mechanic to get a more accurate estimate based on your vehicle's make and model, as well as the severity of the problem.
Tech Notes for P0059
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Code P0059 Information for Specific Makes
- P0059 Buick — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Cadillac — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Chevrolet — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Ford — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 GMC — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Hummer — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Lincoln — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Mazda — HO2S21 Heater Control Circuit Fault
- P0059 Mercury — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Oldsmobile — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Pontiac — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Saturn — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 Suzuki — HO2S21 Heater Control Circuit Low/High/Heater Resistance
Frequently Asked Questions about P0059 Code
What does the OBDII code P0059 mean?
1. P0059 indicates a problem with the heater circuit resistance in the oxygen sensor (HO2S) for Bank 2 Sensor 1, typically caused by a malfunction in the sensor’s heating element or its wiring. 2.
What are the symptoms of code P0059?
Common symptoms include an illuminated check engine light, poor fuel efficiency, rough idling, and in some cases, reduced engine performance. 3.
What causes the P0059 code to appear?
The code can be triggered by a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the engine control module (ECM). 4.
How do I diagnose a P0059 code?
Start by inspecting the oxygen sensor’s wiring and connectors for damage or corrosion. Use a multimeter to test the sensor's heater circuit resistance and check for proper voltage supply to the sensor. 5.
Can a bad oxygen sensor trigger the P0059 code?
Yes, a malfunctioning oxygen sensor with a defective heater circuit is a common cause of the P0059 code. 6.
Is it safe to drive with a P0059 code?
While the vehicle may still be drivable, ignoring this code can lead to poor fuel economy and potential damage to the catalytic converter over time. 7.
How do I fix the P0059 code?
Repairs may include replacing the oxygen sensor, repairing or replacing damaged wiring, checking and replacing fuses, or reprogramming the ECM if needed. 8.
How much does it cost to fix a P0059 code?
The cost to fix the P0059 code varies but typically ranges from $150 to $400, depending on whether the oxygen sensor or wiring needs replacement. 9.
Which sensor is affected by the P0059 code?
The code refers to the heater circuit of the oxygen sensor located in Bank 2 (the side of the engine opposite Cylinder 1), upstream of the catalytic converter. 10.
Can a bad ECM cause the P0059 code?
Yes, although rare, a malfunctioning ECM could cause incorrect readings or fail to supply power to the oxygen sensor heater circuit, resulting in the P0059 code.
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