P0505 – Idle Control System Malfunction
Let’s break down exactly what the P0505 trouble code means for your Geely and how to fix it.
What Does Code P0505 Mean
The P0505 trouble code is an indication of a malfunction in the idle control system of your Geely vehicle. The idle control system is responsible for maintaining a stable engine idle speed, typically between 600-800 RPM. When the system malfunctions, it can cause the engine to idle rough, stall, or experience uneven RPM fluctuations.
Common Geely Models Affected
- Geely Emgrand EC7
- Geely Emgrand GC2
- Geely MK
- Geely GC2 Sedan
- Geely Boyue
Symptoms
- Rough idling or stalling engine
- Decreased fuel efficiency
- Engine hesitation or stumbling
- Difficulty starting the engine
- Uneven or fluctuating engine RPM
- Check Engine Light illumination
- Decreased engine performance
Causes Table
| Potential Cause | Probability (High/Medium/Low) |
|---|---|
| Malfunctioning Idle Air Control Valve | High |
| Faulty Throttle Position Sensor | Medium |
| Clogged or Dirty Idle Air Control Valve | Medium |
| Intake Air Leak | Low |
| Faulty Engine Control Module (ECM) | Low |
| Wiring or Connection Issues | Medium |
Diagnostic Steps
To diagnose the P0505 trouble code, start by monitoring the engine’s idle speed and RPM readings. Readings should change smoothly depending on engine RPM. Inspect the idle air control valve, throttle position sensor, and intake air system for any signs of damage or blockage. Use a scan tool to monitor live data and perform tests on the idle control system. Check for any related trouble codes or pending codes that may indicate a more complex issue.
How to Fix
The primary repair method for the P0505 trouble code is to replace the malfunctioning idle air control valve. In some cases, cleaning or repairing the valve may be possible, but replacement is often the most effective solution. Additionally, inspect and repair any wiring or connection issues, and ensure the throttle position sensor and intake air system are functioning properly.
Is It Safe to Drive with This Code
Driving with the P0505 trouble code active can pose technical risks, such as decreased engine performance, rough idling, and stalling. In extreme cases, it may lead to engine damage or failure. It is recommended to address the issue promptly to avoid any potential risks or consequences.
Estimated Repair Cost
The estimated repair cost for the P0505 trouble code can range from $200 to $500, depending on the specific repair method and replacement parts required. In some cases, additional repairs or maintenance may be necessary, which can increase the overall cost.
Preventive Maintenance Tips
To prevent the P0505 trouble code from occurring, regular maintenance is essential. Ensure the idle air control valve and intake air system are clean and free from debris. Regularly inspect the throttle position sensor and wiring connections for any signs of damage or wear. Additionally, keep the engine and fuel system well-maintained to prevent any related issues.
Related Trouble Codes
- Error P0506 on Geely — Idle Control System RPM Lower Than Expected
- Error P0512 on Geely — Idle Control System RPM Higher Than Expected
- Error P2101 on Geely — Throttle Actuator Control System Fault
- Error P2110 on Geely — Throttle Actuator Control System Forced Limited RPM