P0459 2014 Chevrolet Silverado Code - Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
Quick Answer
The P0459 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates an issue with the evaporative emission purge solenoid valve control circuit registering a high voltage. Common causes include Faulty Purge Solenoid Valve: The most common cause of this code is a malfunctioning evaporative emission purge solenoid valve, Wiring Issues: Damaged or corroded wiring in the purge solenoid valve circuit can lead to high voltage readings, PCM Malfunction: A problem with the powertrain control module (PCM) can also trigger the P0459 code. 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 2014 Chevrolet Silverado indicates Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Purge Solenoid Valve: The most common cause of this code is a malfunctioning evaporative emission purge solenoid valve, Wiring Issues: Damaged or corroded wiring in the purge solenoid valve circuit can lead to high voltage readings, PCM Malfunction: A problem with the powertrain control module (PCM) can also trigger the P0459 code.
- 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 2014 Chevrolet Silverado Description
The P0459 diagnostic trouble code (DTC) for a 2014 Chevrolet Silverado indicates an issue with the evaporative emission purge solenoid valve control circuit registering a high voltage. This component is a crucial part of the vehicle's evaporative emissions system, which is responsible for capturing and storing fuel vapors before they can escape 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 2014 Chevrolet Silverado
- Faulty Purge Solenoid Valve: The most common cause of this code is a malfunctioning evaporative emission purge solenoid valve.
- Wiring Issues: Damaged or corroded wiring in the purge solenoid valve circuit can lead to high voltage readings.
- PCM Malfunction: A problem with the powertrain control module (PCM) can also trigger the P0459 code.
- Vacuum Leaks: Any leaks in the vacuum lines connected to the evaporative emissions system can disrupt the proper operation of the purge solenoid valve.
- Charcoal Canister Issue: A clogged or damaged charcoal canister can prevent the proper flow of fuel vapors through the system, causing high voltage in the circuit.
Symptoms of P0459 2014 Chevrolet Silverado
- Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the vehicle's dashboard.
- Rough Idling: A high voltage in the purge solenoid valve circuit can cause erratic engine idling or stalling.
- Reduced Fuel Efficiency: The vehicle may experience decreased fuel efficiency due to improper functioning of the evaporative emissions system.
- Increased Emissions: The vehicle may fail emissions tests or emit higher levels of pollutants into the environment.
- Vapor Smell: There may be a noticeable smell of fuel vapors around the vehicle, indicating a leak in the evaporative emissions system.
How to Fix P0459 2014 Chevrolet Silverado
- Diagnose the Issue: Use a scan tool to retrieve the DTC and perform a thorough inspection of the evaporative emissions system to identify the root cause of the high voltage in the purge solenoid valve circuit.
- Replace Purge Solenoid Valve: If the purge solenoid valve is found to be faulty, it will need to be replaced with a new one to restore proper operation.
- Check Wiring: Inspect the wiring connected to the purge solenoid valve for any damage or corrosion, and repair or replace as needed.
- Test PCM: If all other components check out, test the powertrain control module (PCM) to ensure it is functioning correctly and reprogram it if necessary.
- Clear Codes: After completing the repairs, clear the DTC using a scan tool and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0459 2014 Chevrolet Silverado
The cost of repairing a P0459 code on a 2014 Chevrolet Silverado can vary depending on the specific cause of the issue. Typically, replacing the evaporative emission purge solenoid valve can cost between $100 and $200 for the part, with additional labor costs ranging from $100 to $200. Overall, the total repair cost can be estimated to be between $200 and $400. However, it's essential to note that these are rough estimates, and actual costs can vary based on factors such as location, labor rates, and the extent of the repairs needed. It's advisable to consult with a qualified mechanic or auto repair shop for a more accurate cost estimate.
Need more information about the P0459 2014 Chevrolet Silverado code?
Need more information on how to fix the P0459 2014 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0459 2014 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0459 2014 Chevrolet Silverado Code
1. What does the OBDII code P0459 mean on a 2014 Chevrolet Silverado?
P0459 indicates a high voltage issue in the Evaporative Emission Purge Solenoid Valve Control Circuit, suggesting a potential electrical malfunction.
2. What are the common symptoms of code P0459 in a 2014 Silverado?
Symptoms may include the check engine light turning on, difficulty starting the engine, poor fuel economy, or a fuel smell near the vehicle.
3. What causes the P0459 code in a 2014 Chevrolet Silverado?
Common causes include a faulty purge solenoid valve, damaged wiring or connectors in the circuit, or a malfunctioning ECM (engine control module).
4. Can I drive my 2014 Silverado with the P0459 code?
While it may be possible to drive with this code, it’s not recommended as it can impact emissions performance and potentially lead to further damage.
5. How do I diagnose the P0459 code on a 2014 Chevrolet Silverado?
Start by checking the purge solenoid valve for proper operation, inspect wiring and connectors for damage, and test the circuit voltage and resistance with a multimeter.
6. How do I fix code P0459 in my 2014 Silverado?
Repairs may involve replacing the purge solenoid valve, repairing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
7. How much does it cost to fix a P0459 code on a 2014 Silverado?
Costs vary but typically range from $50 to $200 for parts and labor, depending on whether the purge solenoid valve or wiring needs replacement.
8. Can a bad gas cap cause the P0459 code in a 2014 Silverado?
While a loose or damaged gas cap can cause other EVAP-related codes, it’s unlikely to directly cause a P0459 code.
9. How does the purge solenoid valve work in a 2014 Chevrolet Silverado?
The purge solenoid valve controls the flow of fuel vapors from the EVAP system to the engine for combustion, reducing emissions.
10. Will clearing the P0459 code with a scanner fix the problem?
Clearing the code will turn off the check engine light temporarily, but the issue will return unless the underlying cause is properly repaired.
Discuss the causes and fixes for P0459 2014 Chevrolet Silverado OBDII Code
Code P0459 2014 Chevrolet Silverado 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.