P0459 2016 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 2016 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 2016 GMC Sierra Description
What are the Possible Causes of the DTC P0459 2016 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 2016 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 2016 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 2016 GMC Sierra Code
1. What does OBDII code P0459 mean on a 2016 GMC Sierra?
Code P0459 indicates that the Evaporative Emission (EVAP) Purge Solenoid Valve Control Circuit is experiencing high voltage, suggesting an issue with the valve or its electrical circuit.
2. What are the common symptoms of code P0459 in a 2016 GMC Sierra?
Symptoms may include an illuminated check engine light, reduced fuel efficiency, difficulty fueling, and a faint fuel odor near the vehicle.
3. What causes the P0459 code on a 2016 GMC Sierra?
Common causes include a faulty EVAP purge solenoid valve, damaged wiring or connectors in the purge valve circuit, or a malfunctioning powertrain control module (PCM).
4. Can I drive my 2016 GMC Sierra with a P0459 code?
Yes, but it’s not recommended for extended periods. While the issue is unlikely to cause immediate damage, it can affect fuel efficiency and emissions performance.
5. How do I diagnose the P0459 code on a 2016 GMC Sierra?
Start by checking the EVAP purge solenoid valve for proper operation, inspect the wiring and connectors for damage, and use a multimeter to test the circuit voltage.
6. How do I fix the P0459 code on my 2016 GMC Sierra?
Repairs may include replacing the EVAP purge solenoid valve, repairing or replacing damaged wiring/connectors, or inspecting and updating the PCM if necessary.
7. How much does it cost to fix code P0459 on a 2016 GMC Sierra?
Repair costs vary but typically range from $100 to $300, depending on whether it involves replacing the purge solenoid valve or repairing wiring.
8. What tools are needed to troubleshoot the P0459 code?
You’ll need an OBDII scanner, a multimeter, and basic hand tools to inspect and test the EVAP purge solenoid valve and wiring.
9. Can a loose gas cap cause the P0459 code on a 2016 GMC Sierra?
No, a loose gas cap typically triggers other EVAP-related codes, but it’s still a good idea to check it as part of troubleshooting.
10. Will clearing the P0459 code with a scanner fix the issue?
Clearing the code may temporarily turn off the check engine light, but the underlying problem must be addressed to prevent the code from returning.
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