P0446
Evaporative Emission Control System Vent Control Circuit Malfunction
📖 What Does P0446 Mean?
The EVAP system vent valve is not operating properly, preventing proper venting of the fuel tank.
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.
Recommended Parts & Tools
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📦 Parts Needed
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Frequently Asked Questions about P0446
How serious is P0446?
This code has a medium severity level. This should be diagnosed and repaired soon to prevent further issues.
Can I drive with P0446?
You can typically drive short distances, but have it diagnosed as soon as possible.
How much does it cost to fix P0446?
Repair costs vary depending on the root cause, but typically range from $100-300 including parts and labor.
Related Diagnostic Codes
Other codes that may appear with P0446
Evaporative Emission Control System Malfunction
Emission Control System Code P0441
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