P0459 2017 GMC Sierra Code - Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
Quick Answer
The Evaporative Emission (EVAP) Purge Solenoid Valve is used to purge fuel vapor from the EVAP canister to the intake manifold. Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Valve, Evaporative Emission Purge Solenoid Valve harness is open or shorted, Evaporative Emission Purge Solenoid Valve 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 2017 GMC Sierra indicates Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Evaporative Emission (EVAP) Purge Solenoid Valve, Evaporative Emission Purge Solenoid Valve harness is open or shorted, Evaporative Emission Purge Solenoid Valve 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.
Code P0459 2017 GMC Sierra Description
What are the Possible Causes of the DTC P0459 2017 GMC Sierra?
- Faulty Evaporative Emission (EVAP) Purge Solenoid Valve
- Evaporative Emission Purge Solenoid Valve harness is open or shorted
- Evaporative Emission Purge Solenoid Valve circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0459 2017 GMC Sierra?
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 2017 GMC Sierra 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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Frequently Asked Questions about P0459 2017 GMC Sierra Code
What does the OBDII code P0459 mean for a 2017 GMC Sierra?
P0459 indicates a "Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage," meaning the purge solenoid is receiving an excessively high voltage signal.
What are the common symptoms of code P0459 in a GMC Sierra?
Common symptoms include an illuminated check engine light, reduced fuel efficiency, difficulty starting, or a noticeable gasoline odor.
What causes code P0459 to appear in a GMC Sierra?
Typical causes include a faulty purge solenoid valve, damaged wiring or connectors in the circuit, or an issue with the powertrain control module (PCM).
Can driving with code P0459 damage my 2017 GMC Sierra?
Driving with code P0459 typically won't cause immediate damage, but it can lead to reduced fuel efficiency and may affect emissions.
How do I diagnose the P0459 code on my GMC Sierra?
Inspect the purge solenoid valve, wiring, and connectors for damage or corrosion. Use a multimeter to check voltage and continuity in the circuit.
What tools do I need to fix code P0459 on a GMC Sierra?
You may need a multimeter, OBDII scanner, basic hand tools, and repair manuals to diagnose and fix the issue.
How do I fix code P0459 on a 2017 GMC Sierra?
Start by replacing the purge solenoid valve if faulty, repairing damaged wiring, cleaning corroded connectors, or updating/reprogramming the PCM if needed.
Is the P0459 code covered under warranty for a GMC Sierra?
Evaporative emission-related repairs may be covered under the vehicle’s emissions warranty, depending on mileage and age.
How much does it cost to repair P0459 on a GMC Sierra?
Repair costs vary but generally range from $100 to $300, depending on whether the purge solenoid valve or wiring needs replacement.
Can I clear code P0459 without fixing the issue?
Clearing the code without addressing the problem may temporarily turn off the check engine light, but the code will likely return as the underlying issue persists.
Discuss the causes and fixes for P0459 2017 GMC Sierra OBDII Code
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