P0455 – Evaporative Emission Control System Leak Detected (gross leak)
Let’s break down exactly what the P0455 trouble code means for your Geely and how to fix it.
WHAT DOES CODE P0455 MEAN
The P0455 trouble code indicates that the Evaporative Emission Control (EVAP) system has detected a gross leak, which means that there is a significant amount of fuel vapor escaping from the system. This can be caused by a variety of factors, including a faulty gas cap, damaged fuel tank, or corroded fuel lines. The EVAP system is designed to capture and recycle fuel vapors, reducing emissions and improving fuel efficiency. When a gross leak is detected, the system will trigger the P0455 code, indicating that there is a problem that needs to be addressed.
COMMON Geely MODELS AFFECTED
- Geely Emgrand EC7
- Geely Emgrand EC8
- Geely GC2
- Geely GC5
- Geely GX7
SYMPTOMS
- Check Engine Light (CEL) illumination
- Decreased fuel efficiency
- Increased emissions
- Fuel odor from the vehicle
- Difficulty starting the engine
- Rough engine idle
- Engine stalling or hesitation
CAUSES TABLE
| Potential Cause | Probability (High/Medium/Low) |
|---|---|
| Faulty gas cap | High |
| Damaged fuel tank | Medium |
| Corroded fuel lines | Medium |
| Clogged fuel vapor canister | Low |
| Failed EVAP system sensor | Low |
| Loose or damaged EVAP system connections | Medium |
DIAGNOSTIC STEPS
To diagnose the P0455 trouble code, start by checking the gas cap for any signs of damage or wear. Next, inspect the fuel tank and fuel lines for any damage or corrosion. Use a scan tool to monitor the EVAP system’s readings, which should change smoothly depending on engine RPM and load. Check the fuel vapor canister and EVAP system sensors for any blockages or faults. Finally, inspect the EVAP system connections for any loose or damaged connections.
HOW TO FIX
The primary repair method for the P0455 trouble code is to identify and repair the leak in the EVAP system. This may involve replacing the gas cap, repairing or replacing the fuel tank, or replacing corroded fuel lines. In some cases, the fuel vapor canister or EVAP system sensors may need to be replaced. It is recommended to consult a professional mechanic to ensure that the repair is done correctly and safely.
IS IT SAFE TO DRIVE WITH THIS CODE
Driving with the P0455 trouble code active can pose some technical risks, including decreased fuel efficiency, increased emissions, and potential engine damage. While it is not immediately hazardous to drive with this code, it is recommended to address the issue as soon as possible to avoid any further damage or complications.
ESTIMATED REPAIR COST
The estimated repair cost for the P0455 trouble code can range from $50 to $500, depending on the severity of the leak and the components that need to be replaced.
PREVENTIVE MAINTENANCE TIPS
To prevent the P0455 trouble code from occurring, it is recommended to regularly inspect the gas cap and fuel tank for any signs of damage or wear. Additionally, keeping the fuel tank at least a quarter full can help to reduce the risk of condensation and corrosion in the EVAP system. Regularly checking the EVAP system connections and sensors can also help to identify any potential issues before they become major problems.
RELATED TROUBLE CODES
- Error P0442 on Geely — Evaporative Emission Control System Leak Detected (small leak)
- Error P0440 on Geely — Evaporative Emission Control System Malfunction
- Error P0456 on Geely — Evaporative Emission Control System Leak Detected (very small leak)
- Error P0453 on Geely — Fuel Cap Sensor Circuit Malfunction