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Engine-Codes – GMC – P0058 2018 GMC Sierra

P0058 2018 GMC Sierra Code - HO2S Heater Control Circuit High Voltage Bank 2 Sensor 2

Quick Answer

The P0058 diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to an issue with the HO2S (Heated Oxygen Sensor) Heater Control Circuit High Voltage for Bank 2 Sensor 2. Common causes include Faulty Oxygen Sensor: The Bank 2 Sensor 2 HO2S itself may be faulty and not functioning properly, causing the high voltage condition, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the heater control circuit and trigger the P0058 code, ECM Malfunction: A malfunction in the engine control module (ECM) that controls the heater circuit of the oxygen sensor can also lead to this code. 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
P0058 2018 GMC Sierra indicates HO2S Heater Control Circuit High Voltage Bank 2 Sensor 2.
Common causes
Common causes include Faulty Oxygen Sensor: The Bank 2 Sensor 2 HO2S itself may be faulty and not functioning properly, causing the high voltage condition, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the heater control circuit and trigger the P0058 code, ECM Malfunction: A malfunction in the engine control module (ECM) that controls the heater circuit of the oxygen sensor can also lead to this code.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0058 2018 GMC Sierra Description

The P0058 diagnostic trouble code (DTC) for a 2018 GMC Sierra refers to an issue with the HO2S (Heated Oxygen Sensor) Heater Control Circuit High Voltage for Bank 2 Sensor 2. This sensor is responsible for monitoring the oxygen levels in the exhaust gases and providing feedback to the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion. The heater control circuit is designed to heat up the sensor quickly to operating temperature for accurate readings.

OBDII Code P0058 2018 GMC Sierra - HO2S Heater Control Circuit High Voltage Bank 2 Sensor 2
P0058 2018 GMC Sierra Code - HO2S Heater Control Circuit High Voltage Bank 2 Sensor 2

Common Causes of P0058 2018 GMC Sierra

  1. Faulty Oxygen Sensor: The Bank 2 Sensor 2 HO2S itself may be faulty and not functioning properly, causing the high voltage condition.
  2. Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the heater control circuit and trigger the P0058 code.
  3. ECM Malfunction: A malfunction in the engine control module (ECM) that controls the heater circuit of the oxygen sensor can also lead to this code.
  4. Exhaust System Leaks: Exhaust leaks near the sensor can cause incorrect readings and trigger the P0058 code.
  5. Short Circuit: A short circuit in the heater control circuit can also cause high voltage readings and trigger the code.

Symptoms of P0058 2018 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P0058 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Decreased Fuel Efficiency: A faulty HO2S heater control circuit can lead to an incorrect air-fuel mixture, resulting in decreased fuel efficiency.
  3. Rough Idle: The engine may experience rough idling or hesitation when the HO2S heater control circuit is not functioning properly.
  4. Failed Emissions Test: If the issue is not resolved, it can lead to increased emissions, causing the vehicle to fail emissions tests.
  5. Engine Misfires: In severe cases, a malfunctioning HO2S heater control circuit can lead to engine misfires or stalling.

How to Fix P0058 2018 GMC Sierra

  1. Diagnose the Issue: Use a scan tool to read the DTC and perform a visual inspection of the oxygen sensor and its wiring to identify the cause of the high voltage condition.
  2. Replace Oxygen Sensor: If the sensor is faulty, replace Bank 2 Sensor 2 with a new, OEM-quality oxygen sensor.
  3. Repair Wiring: Repair or replace any damaged wiring connecting the sensor to the ECM to ensure proper operation of the heater control circuit.
  4. Check ECM: Test the engine control module (ECM) to ensure it is functioning correctly and controlling the sensor heater circuit as intended.
  5. Clear DTC: After completing the repairs, clear the DTC using a scan tool and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0058 2018 GMC Sierra

The typical repair costs for addressing a P0058 code on a 2018 GMC Sierra can vary depending on the specific cause of the issue. On average, replacing an oxygen sensor can cost between $200 and $400, including parts and labor. However, if the wiring needs to be repaired or the ECM requires attention, the total repair cost can increase. It's important to note that diagnosis time and labor rates at auto repair shops can vary, with hourly rates typically ranging between $80 and $150. Factors such as location, vehicle make and model, and engine type can also impact the final repair costs. For a more accurate estimate, it's recommended to consult with local auto repair shops.

What does this mean?

Tech Notes for P0058 2018 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 P0058 2018 GMC Sierra Code

1. What does the OBDII code P0058 mean for a 2018 GMC Sierra?

P0058 indicates a high voltage issue in the heater control circuit for the oxygen sensor in Bank 2, Sensor 2.

2. What are the symptoms of code P0058 in a 2018 GMC Sierra?

Symptoms may include a check engine light, poor fuel efficiency, increased emissions, or the vehicle failing an emissions test.

3. What causes the P0058 code to appear on a 2018 GMC Sierra?

Common causes include a faulty oxygen sensor, damaged wiring or connectors, a short in the heater control circuit, or a malfunctioning ECM.

4. Which sensor is affected by code P0058 on my GMC Sierra?

P0058 refers to the downstream oxygen sensor (Sensor 2) on Bank 2, which is the side of the engine opposite cylinder 1.

5. Can I drive my 2018 GMC Sierra with a P0058 code?

While the vehicle may still be drivable, prolonged use with this code can lead to increased fuel consumption and potential damage to the catalytic converter.

6. How do I diagnose the P0058 code on a 2018 GMC Sierra?

Start by inspecting the wiring and connectors for damage, test the oxygen sensor heater circuit for continuity, and use a multimeter to check for proper voltage.

7. How do I fix the P0058 code on a 2018 GMC Sierra?

Repairs may include replacing the oxygen sensor, repairing damaged wiring, or addressing any short circuits in the heater control circuit.

8. Is the P0058 code related to poor engine performance?

Not directly, but it can lead to inefficient fuel-air mixture adjustments, which might cause minor performance issues over time.

9. How much does it cost to fix the P0058 code on a 2018 GMC Sierra?

Replacing an oxygen sensor typically costs $150–$300, including parts and labor, but repairing wiring or addressing ECM issues may vary.

10. Can a bad ECM cause the P0058 code on a 2018 GMC Sierra?

Yes, a faulty ECM can cause the P0058 code if it fails to regulate the heater control circuit properly.

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