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Engine-Codes – GMC – P0059 2015 GMC Sierra

P0059 2015 GMC Sierra Code - HO2S Heater Resistance Bank 2 Sensor 1

Quick Answer

The P0059 diagnostic trouble code (DTC) for a 2015 GMC Sierra refers to an issue with the Heater Resistance of the HO2S (Heated Oxygen Sensor) for Bank 2 Sensor 1. Common causes include Faulty HO2S heater element, Wiring or connector issues in the heater circuit, Defective ECM. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0059 2015 GMC Sierra indicates HO2S Heater Resistance Bank 2 Sensor 1.
Common causes
Common causes include Faulty HO2S heater element, Wiring or connector issues in the heater circuit, Defective ECM.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Aug 19, 2024
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Code P0059 2015 GMC Sierra Description

The P0059 diagnostic trouble code (DTC) for a 2015 GMC Sierra refers to an issue with the Heater Resistance of the HO2S (Heated Oxygen Sensor) for Bank 2 Sensor 1. The HO2S is responsible for measuring the oxygen content in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture accordingly. The heater element in the sensor is used to bring it up to operating temperature quickly for accurate readings. When the ECM detects a higher than expected resistance in the heater circuit of Bank 2 Sensor 1, it triggers the P0059 code.

OBDII Code P0059 2015 GMC Sierra - HO2S Heater Resistance Bank 2 Sensor 1
P0059 2015 GMC Sierra Code - HO2S Heater Resistance Bank 2 Sensor 1

Common Causes of P0059 2015 GMC Sierra

  1. Faulty HO2S heater element
  2. Wiring or connector issues in the heater circuit
  3. Defective ECM
  4. Corrosion or damage to sensor components
  5. Exhaust leaks affecting sensor performance

Symptoms of P0059 2015 GMC Sierra

  1. Check Engine Light illuminated
  2. Decreased fuel efficiency
  3. Engine running rough or misfiring
  4. Failed emissions test
  5. Reduced engine power

How to Fix P0059 2015 GMC Sierra

  1. Perform a visual inspection of the sensor and wiring for any visible damage or corrosion.
  2. Test the heater circuit using a multimeter to check for resistance within the specified range.
  3. Replace the Bank 2 Sensor 1 HO2S if the heater element is faulty.
  4. Repair or replace any damaged wiring or connectors in the circuit.
  5. Clear the DTC codes and perform a test drive to ensure the issue is resolved.

Cost to Fix P0059 2015 GMC Sierra

The cost of repairing a P0059 code on a 2015 GMC Sierra can vary depending on the specific cause of the issue. Generally, replacing the HO2S sensor can cost between $100 to $300, including parts and labor. However, if additional repairs or diagnostic work are needed, the total cost could be higher. It's recommended to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the specific circumstances of the vehicle.

What does this mean?

Tech Notes for P0059 2015 GMC Sierra

The code means that there is a problem with the heater element circuit of the heated oxygen sensor. The control module monitors how long it takes the sensor to warm up and start sending an adequate signal. The code is set when the sensor is taking too long to warm up. Water getting inside the heated oxygen sensor connector can cause the heated oxygen sensor fuse to blow. Before replacing the sensor, check for the condition of the heated oxygen sensor fuse and connectors. If the fuse and connector are OK, replacing the O2 Sensor usually takes care of the problem.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0059 2015 GMC Sierra Code

1. What are the common symptoms of OBDII code P0059 in a 2015 GMC Sierra?

The common symptoms of OBDII code P0059 (HO2S Heater Resistance Bank 2 Sensor 1) in a 2015 GMC Sierra may include poor engine performance, reduced fuel efficiency, and illuminated check engine light.

2. What does the OBDII code P0059 in a 2015 GMC Sierra indicate?

OBDII code P0059 in a 2015 GMC Sierra indicates an issue with the heater circuit of the oxygen sensor located in Bank 2 Sensor 1.

3. What are the possible causes of OBDII code P0059 in a 2015 GMC Sierra?

Possible causes of OBDII code P0059 in a 2015 GMC Sierra include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or an issue with the engine control module.

4. How can I diagnose OBDII code P0059 in my 2015 GMC Sierra?

Diagnosing OBDII code P0059 in a 2015 GMC Sierra involves using an OBDII scanner to retrieve the code, visually inspecting the oxygen sensor and related components, and testing the sensor's heater circuit for continuity.

5. Can I continue driving my 2015 GMC Sierra with OBDII code P0059?

It is not recommended to continue driving your 2015 GMC Sierra with OBDII code P0059, as it can lead to further engine damage and decreased fuel efficiency. It is best to address the issue promptly.

6. How can I repair OBDII code P0059 in my 2015 GMC Sierra?

To repair OBDII code P0059 in a 2015 GMC Sierra, you may need to replace the oxygen sensor in Bank 2 Sensor 1, repair any damaged wiring or connectors, check and replace any blown fuses, or address any issues with the engine control module.

7. Is it possible to reset OBDII code P0059 in a 2015 GMC Sierra without fixing the underlying issue?

While you can clear the code temporarily by resetting it, the underlying issue causing OBDII code P0059 in a 2015 GMC Sierra will persist. It is crucial to address the root cause of the problem to prevent the code from reappearing.

8. How much does it cost to repair OBDII code P0059 in a 2015 GMC Sierra?

The cost to repair OBDII code P0059 in a 2015 GMC Sierra can vary depending on the exact cause of the issue, the cost of parts, and labor charges. It is advisable to consult a professional mechanic for an accurate estimate.

9. Can a DIY enthusiast fix OBDII code P0059 in a 2015 GMC Sierra?

DIY enthusiasts with automotive repair knowledge and experience may be able to fix OBDII code P0059 in a 2015 GMC Sierra. However, it is essential to have the right tools, access to quality replacement parts, and follow proper repair procedures.

10. How often does OBDII code P0059 occur in a 2015 GMC Sierra?

OBDII code P0059 in a 2015 GMC Sierra is not a common occurrence but can happen due to various factors like sensor wear, electrical issues, or environmental conditions. Regular maintenance and prompt attention to check engine lights can help prevent this code from appearing.

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