What does fault code P0446 mean?
Diagnostic trouble code P0446 is defined as Evaporative Emission System Vent Control Circuit Malfunction. This standard OBD2 code is triggered when your car's powertrain or module sensor voltage deviates from calibrated safety tolerances.
Severity & Can I Drive With Code P0446?
Severity Rating: 2/5 (Moderate Severity)
ℹ️ Can I Drive? You can drive short distances safely, but address this fault soon to maintain optimal engine performance and pass emissions testing.
Common Symptoms of P0446
- Check engine light on
- Hard to fill gas tank (pump clicks off)
Common Causes Ranked by Likelihood
- Blocked EVAP vent valve
- Spider web/dirt clog in vent tube
- Corroded vent solenoid wire
DIY Repair & Troubleshooting Steps
- Inspect vent valve hose under rear bumper for dirt clogs
Professional Shop Repair & Estimated Cost Range
- Replace EVAP vent valve solenoid
Estimated Repair Cost Range: $100 - $300
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