P0446
Evaporative Emission Control System Vent Control Circuit Malfunction
📖 What Does P0446 Mean?
Symptoms
- • Check engine light
- • fuel tank may be difficult to fill
- • fuel odor
- • failed emissions test.
Common Causes
- • Faulty EVAP vent valve
- • damaged wiring to vent valve
- • clogged vent filter
- • mechanical blockage in vent system.
Possible Solutions
Replace EVAP vent valve, repair wiring to vent valve, replace vent filter, clear blockages in vent system.
Fixing this on your car?
Get a vehicle-specific repair guide with exact parts, oil specs, and torque settings for your make and model.
🚙 Get Vehicle-Specific Fix Guide
Select your vehicle to see a customized repair guide with exact parts and specifications:
❓ Common Questions About P0446
Can I drive with code P0446?
You can drive for a short time, but should address code P0446 soon to avoid worsening the problem or failing an emissions test.
How much does it cost to fix P0446?
The estimated repair cost for code P0446 is between $20 and $200. This includes parts and labor for most makes and models.
Is this code easy to fix myself?
Yes, this is often a DIY-friendly repair. With basic tools and the correct part, many owners can resolve this themselves in under an hour.
Required Parts
Recommended Tools
Need a Pro?
Complex codes like P0446 can be tricky. Don't risk it if you're unsure.
Recommended Tool
Professional OBD2 Scanner
Read & clear codes, view live data, and reset service lights yourself.
View Best Sellers ↗Related Diagnostic Codes
Other codes that may appear with P0446
Evaporative Emission Control System Malfunction
P0441: Evaporative Emission Control System Malfunction
EVAP System Leak Detected Small Leak
Evaporative Emission Control System Purge Control Valve Circuit Malfunction
EVAP System Leak Detected Large Leak
💡 Why These Codes Are Related:
- • Similar Issues: Same root cause or component failure
- • Related Problems: Often occur together due to system interactions
- • Sequential Codes: Progressive failure stages or multiple sensors
- • Same System: Components within the same automotive system