P0455: Evaporative Emission Control System Leak Detected (large leak)
Short answer: P0455 means “Evaporative Emission Control System Leak Detected (large leak)”. It is a standard OBD-II code, so the basic meaning is the same on every car. Below is what it means on each of the 5 cars we cover, with a link to the full page for each car.
Standard OBD-II code Same meaning on all cars (SAE J2012).
P0455 on each car
| Car | Meaning on this car | Confidence |
|---|---|---|
| Toyota Corolla (11th gen, E170) | Evaporative Emission Control System Leak Detected (large leak) | medium |
| Toyota Corolla (10th gen, E140) | Evaporative Emission Control System Leak Detected (large leak) | medium |
| Honda City (5th gen, GM2) | Evaporative Emission Control System Leak Detected (large leak) | medium |
| Honda Civic (10th gen, FC) | Evaporative Emission Control System Leak Detected (large leak) | medium |
| Suzuki Wagon R (Pakistan, K10B) | Evaporative Emission Control System Leak Detected (large leak) | medium |
Symptoms
- Check engine light on
- You likely won't notice any drivability problems
Likely causes
- A loose or improperly affixed gas cap
- A non-conforming gas cap (i.e. not factory/original brand)
- Other leak or damaged piece in EVAP system
What to check, in order
- Read the code and live data with an OBD-II scanner
- Look for exhaust or vacuum leaks and check the wiring of the sensor or valve
- Test the part before replacing it
- Fix the cause, clear the code and test-drive
Causes and checks above are the general meaning. The exact test steps and values differ by car: open your car’s page.