You’re dealing with a P1655 code, which means your vehicle’s onboard computer has detected a problem with the EVAP purge solenoid control circuit. This issue can manifest in different ways, from decreased fuel efficiency to engine performance woes.
You might notice a rough idle, stalling, or failed emissions tests – or maybe nothing at all, yet. Whatever the case, it’s essential to address this fault code promptly to prevent further problems. What’s causing this issue, and how do you fix it?
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Key Takeaways
- The P1655 code indicates a problem with the EVAP purge solenoid control circuit, affecting fuel efficiency and vehicle performance.
- Faulty components, electrical issues, and malfunctioning PCM can trigger the code, requiring inspection and potential replacement.
- Symptoms include illuminated check engine light, rough idle, reduced fuel efficiency, and decreased vehicle performance.
- To diagnose and fix the code, inspect the wiring and connections, test the purge solenoid, and address vacuum leaks in the EVAP system.
- Regular maintenance, including EVAP system checks and tune-ups, can help prevent future occurrences of the P1655 code.
What Is the P1655 Code?
The P1655 code is a trouble code that indicates a problem with the EVAP purge solenoid control circuit.
As you’re experiencing this issue, you’ll likely notice decreased fuel efficiency and potential vehicle performance problems.
The EVAP purge solenoid is responsible for controlling the flow of fuel vapors from the charcoal canister to the engine intake manifold.
When the circuit malfunctions, it can lead to increased emissions and engine performance issues.
The code may cause the check engine light to illuminate on your vehicle’s dashboard, indicating that it’s time to address the problem to restore ideal fuel efficiency and performance.
Common Causes of the P1655 Code
You’ve diagnosed the P1655 code, which indicates a problem with the EVAP purge solenoid control circuit.
Now, it’s time to identify the root cause. Common culprits include faulty components, such as a defective purge solenoid, and electrical issues like corroded or damaged wiring or connectors in the control circuit.
A malfunctioning PCM can also trigger this code. Additionally, vacuum leaks in the EVAP system or problems with the charcoal canister can lead to the P1655 code.
Symptoms of the P1655 Code
When your vehicle’s check engine light illuminates, it’s often a sign that something’s amiss.
The P1655 code can cause a range of symptoms that affect your vehicle’s performance and emissions.
You may notice a rough idle or engine stalling, which can be frustrating and inconvenient.
Additionally, the faulty EVAP purge solenoid control circuit can lead to reduced fuel efficiency, which can hit your wallet.
In severe cases, your vehicle may fail emissions tests due to increased emissions.
It’s essential to address the issue promptly to prevent further damage and costly repairs.
How to Fix the P1655 Code
Diagnosing the root cause of the P1655 code is essential to fixing the issue efficiently.
You’ll need to inspect the wiring and connections in the EVAP purge solenoid control circuit for damage, corrosion, or loose connections. Test the purge solenoid to confirm it’s functioning properly, and replace it if necessary.
Addressing any vacuum leaks in the EVAP system is also pivotal. By fixing the underlying issue, you’ll restore proper fuel vapor control, improving fuel efficiency and preventing increased emissions.
Diagnosing the Issue
To accurately diagnose the P1655 code, start by retrieving the stored code using a scan tool, which will give you a better understanding of the issue.
This will provide you with valuable information about the circuit’s performance and help you pinpoint the problem area.
Next, perform a circuit analysis to identify any voltage or resistance issues in the EVAP purge solenoid control circuit.
Use your scan tool to monitor the circuit’s operation and look for any anomalies.
Inspecting the Wiring and Connections
One crucial step in resolving the P1655 code is inspecting the wiring and connections in the EVAP purge solenoid control circuit. You’ll need to check for signs of wire damage, corrosion, or loose connections that could be causing the issue.
| Inspection Point | What to Look For | Possible Causes |
|---|---|---|
| Wiring harness | Cracks, frays, or corrosion | Wire damage, age |
| Connectors | Corrosion, loose connections | Wire damage, poor installation |
| Solenoid terminals | Corrosion, high resistance | Solenoid resistance, poor connection |
| Fuse or relay | Blown fuse or malfunctioning relay | Electrical surge, overload |
| Ground connections | Corrosion, loose connections | Poor installation, wear and tear |
Remember to inspect each point carefully, as even a small issue can trigger the P1655 code.
Testing the Purge Solenoid
The purge solenoid, a pivotal component in the EVAP system, plays a paramount role in controlling the flow of fuel vapors to the engine intake manifold.
You’ll need to test it to verify it’s functioning correctly. Start by disconnecting the electrical connector from the solenoid and checking for signs of corrosion or damage.
Next, use a multimeter to perform circuit analysis, measuring the solenoid’s resistance and voltage drop. Compare your readings to the manufacturer’s specifications to determine if the solenoid is faulty.
If it’s not working as expected, replace it with a new one to guarantee the resolution of the P1655 code.
Repairing Vacuum Leaks
After verifying the purge solenoid’s functionality, you’ll need to address another potential cause of the P1655 code: vacuum leaks in the EVAP system. Vacuum leaks can be challenging to diagnose, but using the right leak detection methods is vital.
| Method | Description | Effectiveness |
|---|---|---|
| Smoke Testing | Uses a smoke machine to visualize leaks | High |
| Vacuum Testing | Applies vacuum pressure to identify leaks | Medium |
| Pressure Testing | Uses compressed air to detect leaks | Low |
| Ultrasonic Testing | Uses sound waves to detect leaks | High |
Remember to inspect the entire EVAP system, including hoses, connections, and components, to guarantee a thorough vacuum system diagnosis.
Clearing Codes and Test Driving
You’ve diagnosed the issue, repaired or replaced the faulty component, and now it’s time to clear the code and test drive the vehicle to verify the problem has been rectified.
Use a scan tool to perform a code reset, which will erase the P1655 code from the PCM’s memory.
Next, complete a drive cycle to guarantee the EVAP system is functioning correctly.
This typically involves a series of specific driving procedures, such as idling, accelerating, and cruising, to allow the PCM to re-learn the system’s parameters.
Cost to Fix the P1655 Code
Repairing the EVAP Purge Solenoid Control Circuit issue can come with a cost, which varies depending on the specific cause of the problem and the make and model of your vehicle. To give you a better idea, here’s a breakdown of the estimated costs:
| Repair Component | Part Cost | Labor Cost |
|---|---|---|
| Purge Solenoid | $50-$100 | $100-$200 |
| Wiring/Connectors | $20-$50 | $50-$100 |
| PCM Reprogramming | $100-$200 | $100-$200 |
Keep in mind that these are general estimates, and the actual cost may vary depending on your location and the shop you choose. It’s a good idea to get quotes from multiple shops to compare prices and find the best deal.
Preventing Future Occurrences
Now that you’ve addressed the P1655 code, it’s vital to take preventative measures to avoid its recurrence.
Regular maintenance is key to preventing future occurrences of this code. Make sure to regularly inspect the EVAP system, including the purge solenoid, wiring, and connections, for any signs of damage or corrosion.
Addressing any issues promptly will help prevent the code from coming back. Additionally, performing routine tune-ups and fuel system checks can help identify potential problems before they become major issues.
More OBD-II Codes
| P1660 | P1661 | P1671 | P1672 |
| P1673 | P1674 | P1675 | P1676 |
| P1677 | P1678 | P1679 | P1680 |
| P1681 | P1117 | P1685 | P1686 |
| P1687 | P1688 | P1689 | P1691 |
| P1695 | P1155 | P1156 | P1157 |
Frequently Asked Questions
Will a P1655 Code Cause My Vehicle to Fail an Emissions Test?
You’ll likely fail an emissions test with a P1655 code, as it indicates an issue with the EVAP system, which can lead to increased emissions, violating emissions regulations, especially if you’ve made vehicle modifications that compromise the system’s functionality.
Can a Faulty Oxygen Sensor Trigger a P1655 Code?
You’re wondering if a faulty oxygen sensor can trigger a P1655 code. The answer is no, a sensor malfunction won’t directly cause this code, as it’s related to the EVAP purge solenoid control circuit, not oxygen sensor issues, which typically affect fuel efficiency.
Will a P1655 Code Cause Damage to My Engine or Other Components?
You may not experience immediate engine damage from a faulty EVAP purge solenoid control circuit, but prolonged solenoid failure can lead to reduced fuel efficiency, potentially causing long-term engine wear and decreased performance over time.
Can I Drive My Vehicle Safely With a P1655 Code?
You can drive your vehicle with a P1655 code, but be cautious; faulty wiring or solenoid malfunction can lead to reduced fuel efficiency, rough idling, and increased emissions, potentially causing damage to your engine or other components over time.
Will a Tune-Up or Oil Change Fix a P1655 Code?
You’re wondering if a tune-up or oil change will fix the issue, but unfortunately, it won’t; spark plug fouling and fuel injector cleaning won’t address the faulty EVAP purge solenoid control circuit, which requires specific repairs to resolve the problem.
Conclusion
You’ve successfully navigated the troubleshooting process for the P1655 code, and your vehicle is now running smoothly again. Like a well-oiled machine, all the components are working together in harmony, ensuring peak performance and fuel efficiency. By addressing the issue promptly, you’ve prevented further problems down the road. Remember, regular maintenance is key to avoiding costly repairs and keeping your vehicle in top condition.
