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Engine-Codes – Subaru – P0058 Subaru

P0058 Subaru Code - HO2S22 Heater Control Circuit High

Quick Answer

The P0058 diagnostic trouble code (DTC) for Subaru vehicles refers to an issue with the HO2S22 (Heated Oxygen Sensor 2 Bank 2) heater control circuit, indicating that the circuit is experiencing a high voltage condition. Common causes include Faulty HO2S22 (Heated Oxygen Sensor 2 Bank 2), Damaged wiring or connectors in the sensor circuit, Blown fuse related to the sensor heater circuit. 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 Subaru indicates HO2S22 Heater Control Circuit High.
Common causes
Common causes include Faulty HO2S22 (Heated Oxygen Sensor 2 Bank 2), Damaged wiring or connectors in the sensor circuit, Blown fuse related to the sensor heater circuit.
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 09, 2024
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Code P0058 Subaru Description

The P0058 diagnostic trouble code (DTC) for Subaru vehicles refers to an issue with the HO2S22 (Heated Oxygen Sensor 2 Bank 2) heater control circuit, indicating that the circuit is experiencing a high voltage condition. This sensor 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 for optimal combustion. The heater control circuit is essential for the sensor to reach operating temperature quickly and accurately.

OBDII Code P0058 Subaru - HO2S22 Heater Control Circuit High
P0058 Subaru Code - HO2S22 Heater Control Circuit High

Common Causes of P0058 Subaru

  1. Faulty HO2S22 (Heated Oxygen Sensor 2 Bank 2)
  2. Damaged wiring or connectors in the sensor circuit
  3. Blown fuse related to the sensor heater circuit
  4. ECM malfunction or software issue
  5. Exhaust leaks affecting sensor performance

Symptoms of P0058 Subaru

  1. Check engine light illuminated on the dashboard
  2. Decreased fuel efficiency
  3. Rough idling or stalling
  4. Engine hesitation or misfires
  5. Failed emissions test

How to Fix P0058 Subaru

  1. Perform a diagnostic scan to confirm the P0058 code and pinpoint the exact cause of the issue.
  2. Inspect the HO2S22 sensor, wiring, and connectors for any visible damage or corrosion.
  3. Test the sensor heater circuit for continuity and resistance to determine if the sensor is faulty.
  4. Replace the HO2S22 sensor if it fails the tests or shows signs of damage.
  5. Clear the DTC and perform a road test to ensure the issue has been resolved.

Cost to Fix P0058 Subaru

The cost of repairing the P0058 code for a Subaru vehicle can vary depending on the cause of the issue and the labor rates in your area. Typically, the price of a new HO2S22 sensor ranges from $50 to $200, depending on the brand and quality. Labor costs can range from $100 to $200, with total repair costs falling between $150 and $400. It's important to factor in additional diagnostic fees and taxes when budgeting for this repair. Remember that labor rates can vary significantly between different auto repair shops and locations, so it's advisable to obtain quotes from multiple sources before proceeding with the repair.

When is the Code Detected?

The P0058 is set when the ECM detects an excessively high voltage through the heated oxygen sensor heater circuit

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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 Subaru Code

1. What are the common symptoms of OBDII code P0058 in a Subaru?

- Common symptoms include poor fuel economy, rough idling, engine misfires, and potentially an illuminated check engine light.

2. What does the HO2S22 Heater Control Circuit High code mean in a Subaru?

- This code indicates that the oxygen sensor (HO2S22) located after the catalytic converter is detecting a high voltage in its heater control circuit.

3. What are the possible causes of the P0058 code in a Subaru?

- Potential causes include a faulty oxygen sensor, damaged wiring or connectors in the heater circuit, a blown fuse, or a problem with the Engine Control Module (ECM).

4. How can I diagnose the issue causing code P0058 in my Subaru?

- Start by checking the oxygen sensor's wiring and connectors for damage. Test the sensor's heater circuit resistance and voltage. Use a scan tool to monitor live data and confirm the high voltage reading.

5. Can I drive my Subaru with the P0058 code present?

- It is generally safe to drive with this code, but it is recommended to address the issue promptly to prevent potential long-term damage to the catalytic converter and ensure optimal engine performance.

6. How can I repair the HO2S22 Heater Control Circuit High code in my Subaru?

- The most common repair is to replace the faulty oxygen sensor (HO2S22) with a new one. Ensure the wiring and connectors are in good condition and the fuse related to the sensor is intact.

7. Will resetting the check engine light resolve the P0058 code in my Subaru?

- Resetting the check engine light may temporarily clear the code, but it will likely return if the underlying issue causing the high voltage in the heater circuit is not addressed.

8. How much does it typically cost to repair OBDII code P0058 in a Subaru?

- The cost of repairing this code can vary depending on the cause of the issue, but it usually ranges from $150 to $300 for parts and labor if you take your vehicle to a mechanic.

9. Can a DIY enthusiast fix the P0058 code in a Subaru?

- Yes, if you have the necessary tools and experience working on automotive electrical systems, you may be able to replace the oxygen sensor and check the wiring yourself to resolve the issue.

10. How often does the HO2S22 Heater Control Circuit High code occur in Subaru vehicles?

- While not extremely common, this code can occur in Subaru vehicles, especially in older models or those with high mileage, due to normal wear and tear on sensor components.

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