What P0449 means
Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction
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 P0449:
| BMW | Evaporative Emission System Vent Valve/Solenoid Circuit |
| FORD | Evap Emission Control System Vent Circuit Intermittent |
| MITSUBISHI | Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction |
| NISSAN | Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction |
| VOLKSWAGEN | Evaporative Emission (EVAP) Vent Solenoid Control Circuit |
Read this code on your own car
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