AutoCodes – GMC – P0059 2014 GMC Sierra

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

Quick Answer

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection. 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 Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection.
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.

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Code Popularity 230

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Mar 25, 2024

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0059 2014 GMC Sierra Description

Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach an operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensors to reach operating temperature. Voltage is provided to the heater by an ignition voltage circuit through a fuse. With the engine running, the ground is provided to the heater by the HO2S heater low control circuit through a low side driver within the Engine Control Module (ECM). The ECM uses Pulse Width Modulation (PWM) to control the HO2S heater operation to maintain a specific HO2S operating temperature range.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects the HO2S heater is not within a specified resistance range at engine start-up.

OBDII Code P0059 2014 GMC Sierra - HO2S Heater Resistance Bank 2 Sensor 1 - AutoCodes.com — P0059 2014 GMC Sierra Code - HO2S Heater Resistance Bank 2 Sensor 1

What does this mean?

What are the Possible Causes of the DTC P0059 2014 GMC Sierra?

Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted
Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
Heated Oxygen Sensor Bank 2 Sensor 1 circuit fuse
Faulty Engine Control Module (ECM)

How to Fix the DTC P0059 2014 GMC Sierra?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What does this mean?

Code Tech Notes

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0059 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

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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.