What P0456 means
Fuga detectada en sistema de control de contaminación por evaporación (fuga muy pequeña)
Common causes (general)
Before spending money on parts, verify the code with a scan tool and read freeze frame data. Freeze frame captures every sensor value at the moment the code set — this is often enough to figure out the root cause without further testing.
Manufacturer-specific descriptions
Different manufacturers use this code for slightly different failure modes. Here's what your specific make means by P0456:
| BMW | Evaporative Emission System Leak Detected (very small leak) |
| HONDA | Evaporative Emission (EVAP) System Very Small Leak Detected |
| MITSUBISHI | EVAP.emission(very small leak) |
Read this code on your own car
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