P0459 BMW Code - Evaporative Emission Purge Solenoid Control Circuit High Voltage
Quick Answer
The P0459 BMW code indicates a problem with the evaporative emission purge solenoid control circuit, specifically detecting a high voltage condition. Common causes include Faulty evaporative emission purge solenoid, Wiring issues in the purge solenoid control circuit, Corrosion or damage to electrical connectors. 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 BMW indicates Evaporative Emission Purge Solenoid Control Circuit High Voltage.
- Common causes
- Common causes include Faulty evaporative emission purge solenoid, Wiring issues in the purge solenoid control circuit, Corrosion or damage to electrical connectors.
- 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 BMW Description
The P0459 BMW code indicates a problem with the evaporative emission purge solenoid control circuit, specifically detecting a high voltage condition. The evaporative emission system in a vehicle is responsible for capturing and storing fuel vapors from the fuel tank to prevent them from escaping into the atmosphere. The purge solenoid is a crucial component of this system, controlling the flow of fuel vapors into the engine for combustion.
Common Causes of P0459 BMW
- Faulty evaporative emission purge solenoid
- Wiring issues in the purge solenoid control circuit
- Corrosion or damage to electrical connectors
- PCM (Powertrain Control Module) failure
- Vacuum leaks in the evaporative emission system
Symptoms of P0459 BMW
- Check Engine Light illuminated
- Decreased fuel efficiency
- Rough idling or stalling
- Failed emissions test
- Strong fuel odor
How to Fix P0459 BMW
- Diagnose the issue using a scan tool to confirm the P0459 code and identify the specific cause.
- Inspect the wiring and connectors in the purge solenoid control circuit for any damage or corrosion.
- Test the evaporative emission purge solenoid for proper operation and replace if faulty.
- Clear the code and reset the PCM to see if the issue is resolved.
- Perform a smoke test to check for vacuum leaks in the evaporative emission system and repair as needed.
Cost to Fix P0459 BMW
The typical repair costs for addressing a P0459 BMW code can range from $100 to $300, depending on the specific cause of the issue and the cost of parts and labor. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, factors such as the vehicle make and model, as well as the location and engine type, can also impact the overall repair costs.
When is the Code Detected?
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Frequently Asked Questions about P0459 BMW Code
1. What does the OBDII code P0459 mean on a BMW?
P0459 indicates that the Evaporative Emission Purge Solenoid Control Circuit is experiencing high voltage, which means the purge valve may not be operating correctly.
2. What are the common symptoms of a P0459 code on a BMW?
Symptoms may include the check engine light turning on, a noticeable fuel odor, reduced fuel efficiency, or difficulty starting the engine.
3. What causes the P0459 code to appear on a BMW?
Common causes include a faulty purge solenoid valve, damaged wiring, a defective control module, or a short circuit in the electrical system.
4. Can I drive my BMW with a P0459 code?
While the car may still be drivable, ignoring the code can lead to increased emissions and potential long-term damage to the EVAP system.
5. How do I fix the P0459 code on a BMW?
Possible fixes include replacing the purge solenoid valve, repairing or replacing damaged wiring, or addressing issues with the control module.
6. How do I diagnose a P0459 code on a BMW?
Start by inspecting the purge valve, checking for damaged wiring or connectors, and using a multimeter to test the electrical circuit for continuity or shorts.
7. How much does it cost to repair a P0459 code on a BMW?
Repair costs can vary but typically range from $100 to $300, depending on whether the issue is with the purge valve or wiring.
8. Can a loose gas cap cause a P0459 code?
No, a loose gas cap is not a common cause of a P0459 code, as it specifically relates to the purge solenoid circuit and not the fuel tank pressure.
9. Will clearing the P0459 code fix the issue permanently?
Clearing the code may temporarily turn off the check engine light, but the root cause of the problem must be addressed to prevent the code from returning.
10. Is the P0459 code covered under BMW's warranty?
It depends on your vehicle's warranty and mileage. EVAP system components are often covered under emissions warranties, so check with your dealer for details.
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