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Engine-Codes – GMC – P0059 2014 GMC Sierra

P0059 2014 GMC Sierra Code - HO2S Heater Resistance Bank 2 Sensor 1

Quick Answer

The P0059 code in a 2014 GMC Sierra specifically refers to an issue with the HO2S (Heated Oxygen Sensor) Heater Resistance in Bank 2 Sensor 1. Common causes include Faulty oxygen sensor heater, Damaged wiring or connectors in the sensor circuit, Blown fuse related to the oxygen sensor heater. 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 2014 GMC Sierra indicates HO2S Heater Resistance Bank 2 Sensor 1.
Common causes
Common causes include Faulty oxygen sensor heater, Damaged wiring or connectors in the sensor circuit, Blown fuse related to the oxygen sensor heater.
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 Sep 10, 2024
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Code P0059 2014 GMC Sierra Description

The P0059 code in a 2014 GMC Sierra specifically refers to an issue with the HO2S (Heated Oxygen Sensor) Heater Resistance in Bank 2 Sensor 1. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and sending this information to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. The heater element within the sensor is used to reach operating temperature quickly and maintain it for accurate readings.

OBDII Code P0059 2014 GMC Sierra - HO2S Heater Resistance Bank 2 Sensor 1
P0059 2014 GMC Sierra Code - HO2S Heater Resistance Bank 2 Sensor 1

Common Causes of P0059 2014 GMC Sierra

  1. Faulty oxygen sensor heater
  2. Damaged wiring or connectors in the sensor circuit
  3. Blown fuse related to the oxygen sensor heater
  4. ECM malfunction
  5. Exposure to extreme temperatures or contaminants

Symptoms of P0059 2014 GMC Sierra

  1. Decreased fuel efficiency
  2. Rough idling or engine misfires
  3. Illuminated check engine light
  4. Failed emissions test
  5. Loss of engine power

How to Fix P0059 2014 GMC Sierra

  1. Perform a thorough inspection of the oxygen sensor wiring and connectors for any damage or corrosion.
  2. Check the fuse related to the oxygen sensor heater for any signs of damage and replace if necessary.
  3. Test the oxygen sensor heater element for continuity and resistance to determine if it is functioning properly.
  4. If the oxygen sensor heater is faulty, replace it with a new sensor designed for the specific make and model of the vehicle.
  5. Clear the diagnostic trouble codes from the ECM and perform a test drive to ensure the issue has been resolved.

Cost to Fix P0059 2014 GMC Sierra

The typical repair cost for addressing a P0059 code in a 2014 GMC Sierra can range from $200 to $500, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour, with rates potentially higher in metropolitan areas or at dealerships, and lower at independent shops. It is recommended to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P0059 2014 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 2014 GMC Sierra Code

1. What does OBDII code P0059 for a 2014 GMC Sierra mean?

Code P0059 indicates a problem with the HO2S (Heated Oxygen Sensor) heater resistance for Bank 2 Sensor 1 in the exhaust system.

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

Common symptoms of code P0059 include poor fuel efficiency, rough idling, engine misfires, and the illumination of the check engine light.

3. What can cause OBDII code P0059 to trigger in a 2014 GMC Sierra?

Possible causes of code P0059 include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the sensor's internal heater circuit.

4. How serious is OBDII code P0059 in a GMC Sierra?

While the vehicle may still be operable with code P0059, it is important to address the issue promptly to prevent potential damage to the catalytic converter and ensure optimal engine performance.

5. How can I diagnose OBDII code P0059 in my 2014 GMC Sierra?

Diagnosing code P0059 typically involves using a scan tool to retrieve the specific code, testing the oxygen sensor heater circuit, inspecting wiring and connectors, and checking the sensor's resistance.

6. Can I drive my GMC Sierra with OBDII code P0059?

It is generally not recommended to drive your GMC Sierra with an unresolved P0059 code, as it can lead to decreased fuel efficiency and potential long-term damage to the engine components.

7. How much does it cost to repair OBDII code P0059 in a 2014 GMC Sierra?

The cost of repairing code P0059 can vary depending on the underlying issue. It may involve replacing the oxygen sensor, repairing damaged wiring, or addressing other related components.

8. Can I reset OBDII code P0059 in my GMC Sierra without fixing the issue?

While you can clear the code using a scan tool, it is not recommended to do so without addressing the root cause, as the issue is likely to recur and potentially cause further problems.

9. How long does it take to repair OBDII code P0059 in a 2014 GMC Sierra?

The repair time for code P0059 can vary based on the specific cause of the issue and the extent of the repairs needed. It may take anywhere from a few hours to a full day.

10. Is it possible to prevent OBDII code P0059 from occurring in my GMC Sierra?

Regular maintenance, such as checking and replacing oxygen sensors as needed, inspecting wiring harnesses, and addressing any related issues promptly, can help prevent code P0059 from occurring in your GMC Sierra.

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