p0446
Easy Fix
Cadillac · SUVs
Evaporative Emission Control System Vent Control Circuit
Quick Answer
Error code P0446 on your Cadillac SUVs means: Evaporative Emission Control System Vent Control Circuit. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
Likely Causes
How to Fix It
1
Scan vehicle for trouble code
2
Inspect vent valve electrical connections
3
Test vent valve solenoid
4
Check wiring for continuity
Pro Tip
This is a common issue that most users can resolve without specialized tools. Try the first step before moving on to more complex solutions.
Parts You May Need
Vent valve
Electrical connectors
Multimeter
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