P0459 2015 GMC Sierra Code - Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
Quick Answer
The P0459 diagnostic trouble code (DTC) in a 2015 GMC Sierra indicates a problem with the evaporative emission purge solenoid valve control circuit. Common causes include Faulty Purge Solenoid Valve: The purge solenoid valve itself may be defective and need replacement, Wiring Issues: Problems such as short circuits, open circuits, or high resistance in the wiring or connectors associated with the purge solenoid valve control circuit, PCM Malfunction: A malfunctioning PCM (Powertrain Control Module) may not be properly controlling the evaporative emission purge solenoid valve. 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 2015 GMC Sierra indicates Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Purge Solenoid Valve: The purge solenoid valve itself may be defective and need replacement, Wiring Issues: Problems such as short circuits, open circuits, or high resistance in the wiring or connectors associated with the purge solenoid valve control circuit, PCM Malfunction: A malfunctioning PCM (Powertrain Control Module) may not be properly controlling the evaporative emission purge solenoid valve.
- 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.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
Code P0459 2015 GMC Sierra Description
The P0459 diagnostic trouble code (DTC) in a 2015 GMC Sierra indicates a problem with the evaporative emission purge solenoid valve control circuit. The evaporative emission system is responsible for capturing and storing fuel vapors from the fuel tank to prevent them from being released into the atmosphere. The purge solenoid valve controls the flow of fuel vapors from the charcoal canister to the engine's intake manifold for combustion.
Common Causes of P0459 2015 GMC Sierra
- Faulty Purge Solenoid Valve: The purge solenoid valve itself may be defective and need replacement.
- Wiring Issues: Problems such as short circuits, open circuits, or high resistance in the wiring or connectors associated with the purge solenoid valve control circuit.
- PCM Malfunction: A malfunctioning PCM (Powertrain Control Module) may not be properly controlling the evaporative emission purge solenoid valve.
- Charcoal Canister Issues: A clogged or damaged charcoal canister can also lead to the P0459 code.
- Vacuum Leaks: Any vacuum leaks in the evaporative emission system can cause improper operation of the purge solenoid valve.
Symptoms of P0459 2015 GMC Sierra
- Check Engine Light: The most common symptom associated with the P0459 code is the illumination of the check engine light on the vehicle's dashboard.
- Rough Idle: A malfunctioning evaporative emission system can lead to rough idling or stalling of the engine.
- Fuel Smell: A noticeable fuel smell inside or outside the vehicle may indicate a problem with the evaporative emission system.
- Increased Emissions: The vehicle may emit higher levels of pollutants due to the improper functioning of the purge solenoid valve control circuit.
- Reduced Fuel Efficiency: A faulty evaporative emission system can result in decreased fuel efficiency as fuel vapors are not being efficiently recycled.
How to Fix P0459 2015 GMC Sierra
- Diagnose the Issue: Use a scan tool to retrieve the DTC and determine the exact cause of the P0459 code.
- Inspect Wiring and Connectors: Check for any visible damage or corrosion in the wiring and connectors associated with the purge solenoid valve control circuit.
- Test Purge Solenoid Valve: Test the purge solenoid valve for proper operation and replace if necessary.
- Check Charcoal Canister: Inspect the charcoal canister for clogs or damage and replace if needed.
- Clear DTC and Test Drive: Clear the DTC from the PCM memory, perform a test drive to ensure the issue is resolved, and recheck for any stored codes.
Cost to Fix P0459 2015 GMC Sierra
The typical repair costs for addressing the P0459 code in a 2015 GMC Sierra can range from $100 to $300, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
Need more information about the P0459 2015 GMC Sierra code?
Need more information on how to fix the P0459 2015 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0459 2015 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0459 2015 GMC Sierra Code
No Frequently Asked Questions about P0459 2015 GMC Sierra Code found.
Discuss the causes and fixes for P0459 2015 GMC Sierra OBDII Code
Code P0459 2015 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.