P0459 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0459 2018 Chevrolet Silverado?
- 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 2018 Chevrolet Silverado?
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 2018 Chevrolet Silverado 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 2018 Chevrolet Silverado Code
What does the OBDII code P0459 mean for a 2018 Chevrolet Silverado?
The code P0459 indicates a "Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage," meaning the purge valve circuit is receiving a higher-than-expected voltage.
What are the common symptoms of P0459 in a 2018 Chevrolet Silverado?
Symptoms may include an illuminated check engine light, reduced fuel efficiency, failed emissions test, or a noticeable fuel odor.
What causes the P0459 code to appear on a 2018 Chevrolet Silverado?
Common causes include a faulty purge solenoid valve, damaged wiring or connectors in the circuit, a malfunctioning ECM, or electrical issues such as a short or open circuit.
Can I drive my 2018 Chevrolet Silverado with the P0459 code?
While the vehicle may still run, driving with this code for an extended period can lead to increased emissions or other issues. It’s best to address the problem promptly.
How do I diagnose the P0459 code on a 2018 Chevrolet Silverado?
Diagnosing involves checking the purge valve for proper operation, inspecting the wiring and connectors for damage, and testing the voltage and resistance in the circuit.
What repairs are commonly needed to fix the P0459 code?
Repairs may include replacing the purge solenoid valve, repairing or replacing damaged wiring or connectors, or reprogramming or replacing the ECM if necessary.
How much does it cost to repair the P0459 code on a 2018 Chevrolet Silverado?
Repair costs vary but typically range from $150 to $400, depending on whether the purge valve or other components need replacement.
Can a bad gas cap cause the P0459 code?
While a loose or damaged gas cap can trigger other EVAP-related codes, it is unlikely to cause P0459, which specifically relates to the purge valve circuit.
How can I prevent the P0459 code from recurring?
Regular maintenance, including inspecting the EVAP system components and ensuring wiring is intact, can help prevent this code from reappearing.
What tools are needed to diagnose and repair the P0459 code?
You’ll need an OBDII scanner, a multimeter, and basic hand tools for inspecting and testing the purge valve and circuit.
Discuss the causes and fixes for P0459 2018 Chevrolet Silverado OBDII Code
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