AutoCodes – Subaru – P0458 Subaru

P0458 Subaru Code - EVAP System Purge Control Valve Circuit Low

Quick Answer

The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Control, Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted, Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

What it means: P0458 Subaru indicates EVAP System Purge Control Valve Circuit Low.
Common causes: Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Control, Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted, Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection.
Severity: Low - monitor the vehicle and repair when practical.
Can I drive?: The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.

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Code Popularity 31,167

How popular is this code, among other codes? Low

Repair Importance Level

Low (Monitor) (1 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jun 14, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0458 Subaru Description

The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses a ON/OFF duty to control the flow rate of fuel vapor from the EVAP canister. The EVAP canister purge volume control solenoid valve is moved by ON/OFF pulses from the Engine Control Module (ECM). The longer the ON pulse, the greater the amount of fuel vapor that will flow through the valve.

OBDII Code P0458 Subaru - EVAP System Purge Control Valve Circuit Low - AutoCodes.com — P0458 Subaru Code - EVAP System Purge Control Valve Circuit Low

What does this mean?

What are the Possible Causes of the DTC P0458 Subaru?

Faulty Evaporative Emission (EVAP) Purge Solenoid Control
Evaporative Emission (EVAP) Purge Solenoid Control harness is open or shorted
Evaporative Emission (EVAP) Purge Solenoid Control circuit poor electrical connection

How to Fix the DTC P0458 Subaru?

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

On some Subaru model replacing the PCV valve takes care of the P0458. If the problem persists the Engine Control Module (ECM) may need to be replace.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0458 Subaru 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 P0458 Subaru Code

1. What are the common symptoms of OBDII code P0458 in a Subaru?

The common symptoms of code P0458 in a Subaru include the check engine light illuminating on the dashboard, poor fuel economy, and potential issues with the vehicle's emissions system.

2. What does the OBDII code P0458 in a Subaru indicate?

OBDII code P0458 in a Subaru indicates a problem with the EVAP System Purge Control Valve Circuit being detected as low.

3. What are the possible causes of OBDII code P0458 in a Subaru?

Possible causes of code P0458 in a Subaru include a faulty EVAP purge control valve, damaged wiring or connectors in the circuit, or issues with the powertrain control module (PCM).

4. How serious is OBDII code P0458 in a Subaru?

While OBDII code P0458 may not cause immediate drivability issues, it is important to address this problem promptly to ensure proper functioning of the vehicle's emissions system and to prevent potential damage to other components.

5. Can I continue driving my Subaru with OBDII code P0458?

It is generally not recommended to continue driving your Subaru with an unresolved OBDII code P0458, as it may lead to decreased fuel efficiency and could potentially cause further damage to the vehicle's emissions system.

6. How can I diagnose OBDII code P0458 in my Subaru?

Diagnosing OBDII code P0458 in a Subaru typically involves using an OBDII scanner to retrieve the specific fault code, inspecting the EVAP purge control valve and its circuit for any visible damage, and testing the electrical connections for proper continuity.

7. How can I repair OBDII code P0458 in my Subaru?

Repairing OBDII code P0458 in a Subaru may involve replacing the faulty EVAP purge control valve, repairing or replacing damaged wiring or connectors, or resetting the PCM after completing the necessary repairs.

8. Can I fix OBDII code P0458 in my Subaru by myself?

While some DIY enthusiasts may be able to address OBDII code P0458 in their Subaru, it is recommended to consult a professional mechanic for an accurate diagnosis and proper repair to ensure the issue is resolved effectively.

9. How much does it cost to fix OBDII code P0458 in a Subaru?

The cost of fixing OBDII code P0458 in a Subaru can vary depending on the specific cause of the issue, the cost of parts needed for repair, and the labor rates of the repair shop. It is advisable to obtain quotes from different mechanics for an accurate estimate.

10. How often does OBDII code P0458 occur in Subaru vehicles?

OBDII code P0458 related to the EVAP System Purge Control Valve Circuit Low can occur in Subaru vehicles, especially in older models or those with high mileage. Regular maintenance and inspections can help prevent this issue from arising.