P0459 2018 GMC Sierra Code - Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
Quick Answer
The P0459 diagnostic trouble code (DTC) in a 2018 GMC Sierra indicates a problem with the evaporative emission purge solenoid valve control circuit registering high voltage. Common causes include Faulty evaporative emission purge solenoid valve, Wiring or connector issues in the control circuit, Corrosion or damage to the electrical connections. 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 2018 GMC Sierra indicates Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage.
- Common causes
- Common causes include Faulty evaporative emission purge solenoid valve, Wiring or connector issues in the control circuit, Corrosion or damage to the electrical connections.
- 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 P0459 2018 GMC Sierra Description
The P0459 diagnostic trouble code (DTC) in a 2018 GMC Sierra indicates a problem with the evaporative emission purge solenoid valve control circuit registering high voltage. This component is part of the vehicle's evaporative emission control system, which helps to reduce harmful emissions by capturing and storing fuel vapors before they can escape into the atmosphere.
Common Causes of P0459 2018 GMC Sierra
- Faulty evaporative emission purge solenoid valve
- Wiring or connector issues in the control circuit
- Corrosion or damage to the electrical connections
- ECM (Engine Control Module) malfunction
- Vacuum leaks in the system
Symptoms of P0459 2018 GMC Sierra
- Check engine light illuminated
- Decreased fuel efficiency
- Rough idling or stalling
- Strong fuel odor
- Failed emissions test
How to Fix P0459 2018 GMC Sierra
- Use an OBD-II scanner to confirm the P0459 code and diagnose the issue.
- Inspect the evaporative emission purge solenoid valve and its wiring for any visible damage.
- Test the solenoid valve's resistance and operation using a multimeter.
- Replace the faulty evaporative emission purge solenoid valve if necessary.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0459 2018 GMC Sierra
The cost of repairing a P0459 code in a 2018 GMC Sierra can vary depending on the specific cause of the issue and the labor rates in your area. On average, the replacement of an evaporative emission purge solenoid valve can range from $100 to $300, with additional costs for diagnostic testing and labor. Overall, the total repair cost may fall between $150 and $500. It's recommended to consult with a qualified mechanic or auto repair shop for a more accurate estimate based on your vehicle's needs. Labor rates typically range from $80 to $150 per hour, but can be higher in certain areas or at dealerships.
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