AutoCodes – Hyundai – P0459 Hyundai

P0459 Hyundai Code - EVAP Emission System Purge Control Valve Circuit High

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: P0459 Hyundai indicates EVAP Emission System Purge Control Valve Circuit High.
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 5,100

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
Cost to Diagnose
FAQs
Comments
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Code P0459 Hyundai 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 P0459 Hyundai - EVAP Emission System Purge Control Valve Circuit High - AutoCodes.com — P0459 Hyundai Code - EVAP Emission System Purge Control Valve Circuit High

What does this mean?

What are the Possible Causes of the DTC P0459 Hyundai?

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 P0459 Hyundai?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0459 Hyundai 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.

Need more information about the P0459 Hyundai code?

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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 P0459 Hyundai Code

1. What are the common symptoms of OBDII code P0459 in a Hyundai?

- Common symptoms include the check engine light illuminating, rough idling, decreased fuel efficiency, and possible difficulty starting the vehicle.

2. What does the OBDII code P0459 in a Hyundai indicate?

- OBDII code P0459 indicates a problem with the EVAP Emission System Purge Control Valve Circuit, specifically a high voltage condition.

3. What are the possible causes of OBDII code P0459 in a Hyundai?

- Possible causes include a faulty purge control valve, damaged wiring or connectors in the circuit, a defective PCM, or a vacuum leak in the EVAP system.

4. How can I diagnose the cause of OBDII code P0459 in my Hyundai?

- Diagnosing the issue typically involves using a scan tool to read the code, checking the purge control valve and associated wiring for damage, and performing a smoke test to detect any leaks in the EVAP system.

5. Can I continue driving my Hyundai with OBDII code P0459 present?

- It is generally not recommended to continue driving with this code present, as it can lead to further damage to the vehicle and potentially affect emissions compliance.

6. How can I repair OBDII code P0459 in my Hyundai?

- Repair options may include replacing the purge control valve, repairing or replacing damaged wiring or connectors, resetting the PCM, or fixing any leaks in the EVAP system.

7. Will resetting the check engine light resolve OBDII code P0459 in a Hyundai?

- Resetting the check engine light may temporarily turn it off, but it will not fix the underlying issue causing the P0459 code to be triggered.

8. Is OBDII code P0459 a serious problem in a Hyundai?

- While it may not cause immediate harm to the vehicle, ignoring OBDII code P0459 can lead to decreased fuel efficiency, increased emissions, and potential damage to other components in the long run.

9. Can I prevent OBDII code P0459 from occurring in my Hyundai?

- Regularly inspecting and maintaining the EVAP system components, such as the purge control valve and associated wiring, can help prevent the occurrence of OBDII code P0459.

10. How much does it typically cost to repair OBDII code P0459 in a Hyundai?

- The cost of repairing OBDII code P0459 can vary depending on the specific cause of the issue, but it may range from $100 to $300 for parts and labor.