P0459 Saturn Code - Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage
Quick Answer
The P0459 diagnostic trouble code (DTC) for Saturn vehicles indicates a problem with the evaporative emission purge solenoid valve control circuit, specifically a high voltage issue. Common causes include Faulty Purge Solenoid Valve: The most common cause of the P0459 code is a malfunctioning purge solenoid valve, Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the solenoid valve can also trigger this code, PCM Malfunction: A problem with the powertrain control module (PCM) can cause voltage irregularities in the evaporative emission system. 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 Saturn indicates Evaporative Emission Purge Solenoid Valve Control Circuit High Voltage.
- Common causes
- Common causes include Faulty Purge Solenoid Valve: The most common cause of the P0459 code is a malfunctioning purge solenoid valve, Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the solenoid valve can also trigger this code, PCM Malfunction: A problem with the powertrain control module (PCM) can cause voltage irregularities in the evaporative emission system.
- 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 Saturn Description
The P0459 diagnostic trouble code (DTC) for Saturn vehicles indicates a problem with the evaporative emission purge solenoid valve control circuit, specifically a high voltage issue. The evaporative emission system is responsible for controlling the release of fuel vapors from the fuel tank into the engine intake system, where they can be burned off rather than released into the atmosphere. The purge solenoid valve is a crucial component of this system, as it regulates the flow of vapors from the charcoal canister to the engine for combustion.
Common Causes of P0459 Saturn
- Faulty Purge Solenoid Valve: The most common cause of the P0459 code is a malfunctioning purge solenoid valve.
- Wiring Issues: Corrosion, damage, or loose connections in the wiring harness connected to the solenoid valve can also trigger this code.
- PCM Malfunction: A problem with the powertrain control module (PCM) can cause voltage irregularities in the evaporative emission system.
- Vacuum Leaks: Any leaks in the vacuum lines or hoses connected to the evaporative emission system can disrupt the proper operation of the purge solenoid valve.
- Charcoal Canister Issues: A clogged or damaged charcoal canister can also lead to high voltage readings in the purge solenoid valve circuit.
Symptoms of P0459 Saturn
- 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 cause the engine to run rough or idle erratically.
- Decreased Fuel Efficiency: A high voltage issue with the purge solenoid valve can lead to increased fuel consumption as the engine may not be burning fuel vapors efficiently.
- Strong Fuel Odor: If the evaporative emission system is not functioning properly, you may notice a strong smell of fuel around the vehicle.
How to Fix P0459 Saturn
- Diagnose the Issue: Use a diagnostic scan tool to read the code and pinpoint the exact cause of the high voltage reading in the evaporative emission purge solenoid valve control circuit.
- Inspect Wiring and Connections: Check the wiring harness and connections for any signs of damage, corrosion, or looseness. Repair or replace as needed.
- Test the Purge Solenoid Valve: Test the purge solenoid valve to ensure it is functioning properly. Replace if faulty.
- Check Vacuum Lines: Inspect the vacuum lines and hoses for any leaks or damage. Repair or replace as necessary.
- Clear Codes and Test Drive: Clear the DTC from the PCM, then test drive the vehicle to ensure that the issue has been resolved.
Cost to Fix P0459 Saturn
The cost of repairing a P0459 code on a Saturn vehicle can vary depending on the specific cause of the issue and the labor rates in your area. In general, you can expect to pay anywhere from $100 to $300 for parts and labor to address this problem. Keep in mind that diagnostic time and labor rates at auto repair shops can fluctuate based on location, vehicle make and model, and engine type. It's recommended to get a few quotes from different shops to ensure you're getting a fair price for the repair.
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