AutoCodes – Generic – P0459

P0459 Code - Evaporative Emission Purge Solenoid Control Circuit High Voltage

Quick Answer

The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses an 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 Purge Solenoid Control harness is open or shorted, Evaporative Emission 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 indicates Evaporative Emission Purge Solenoid Control Circuit High Voltage.
Common causes: Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Control, Evaporative Emission Purge Solenoid Control harness is open or shorted, Evaporative Emission 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.

Save to My Repairs My Repairs

AI answers can be wrong. Verify repairs with testing. Open full chat

Code Popularity 19,880

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 Oct 23, 2023

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
Add Comment

💬 Need more help? Ask Coddy for instant answers — it's free!

Code P0459 Description

The Evaporative Emission System (EVAP) canister purge volume control solenoid valve uses an 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. The Diagnostic Trouble Code (DTC) will be set when the ECM has detected a high voltage on the canister purge solenoid with the driver's commanded on.

OBDII Code P0459 - Evaporative Emission Purge Solenoid Control Circuit High Voltage - AutoCodes.com — P0459 Code - Evaporative Emission Purge Solenoid Control Circuit High Voltage

What does this mean?

What are the Possible Causes of the DTC P0459?

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

How to Fix the DTC P0459?

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 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 code?

Need more information on how to fix the P0459 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0459 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P0459 Audi — EVAP System Purge Control Solenoid High
P0459 BMW — Evaporative Emission Purge Solenoid Control Circuit High Voltage
P0459 Buick — Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
P0459 Cadillac — Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
P0459 Chevrolet — Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
P0459 Chrysler — Evaporative Emission Purge Solenoid Control Circuit High Voltage
P0459 Dodge — Evaporative Emission Purge Solenoid Control Circuit High Voltage
P0459 GMC — Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
P0459 Hyundai — EVAP Emission System Purge Control Valve Circuit High
P0459 Jeep — Evaporative Emission Purge Solenoid Control Circuit High Voltage
P0459 KIA — EVAP Emission System Purge Valve Circuit High
P0459 MINI — Evaporative Emission Purge Solenoid Control Circuit High Voltage
P0459 Pontiac — Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
P0459 RAM — Evaporative Emission Purge Solenoid Control Circuit High Voltage
P0459 Saturn — Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
P0459 Subaru — EVAP System Purge Control Valve Circuit High
P0459 Volkswagen — EVAP System Purge Control Solenoid High

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 Code

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

The common symptoms of code P0459 include the check engine light being illuminated on the dashboard, decreased fuel efficiency, and potential issues with the vehicle's emissions system.

2. What can cause OBDII code P0459 to appear?

The most common cause of code P0459 is a malfunction in the evaporative emission purge solenoid control circuit, resulting in high voltage readings. Other potential causes include wiring issues, a faulty purge solenoid, or a problem with the PCM (powertrain control module).

3. How serious is OBDII code P0459?

While code P0459 may not cause immediate drivability issues, it is still important to address this problem promptly. Ignoring the code can lead to increased emissions, poor fuel economy, and potential damage to other emission control components.

4. Can I drive my vehicle with OBDII code P0459?

It is generally safe to drive your vehicle with code P0459, but it is recommended to have the issue diagnosed and repaired as soon as possible to prevent any long-term damage to the emissions system.

5. How can I diagnose OBDII code P0459?

Diagnosing code P0459 usually involves using an OBDII scanner to retrieve the code and then performing a thorough inspection of the evaporative emission system, including checking the purge solenoid, wiring, and connections for any faults.

6. How can I repair OBDII code P0459?

Repairing code P0459 typically involves replacing a faulty evaporative emission purge solenoid, repairing any damaged wiring or connections, or reprogramming the PCM if necessary. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.

7. Can a DIY enthusiast fix OBDII code P0459?

While some DIY enthusiasts may be able to address code P0459 by replacing the purge solenoid or checking for wiring issues, it is often recommended to seek the help of a professional mechanic to ensure the problem is correctly diagnosed and repaired.

8. How much does it cost to fix OBDII code P0459?

The cost of fixing code P0459 can vary depending on the underlying cause of the issue, the labor rates in your area, and the cost of parts. It is advisable to obtain multiple quotes from different repair shops to find the best price for the repair.

9. Can OBDII code P0459 cause other problems if left unresolved?

If left unresolved, OBDII code P0459 can potentially lead to increased emissions, decreased fuel efficiency, and further damage to the vehicle's emission control system. It is best to address the issue promptly to prevent any additional problems.

10. How can I prevent OBDII code P0459 from reoccurring?

To prevent code P0459 from reoccurring, it is essential to perform regular maintenance on the evaporative emission system, including checking for leaks, ensuring proper sealing of the fuel cap, and addressing any issues promptly to avoid high voltage readings in the purge solenoid control circuit.