P0446Cadillac Xt4Years: 1996 - 2026
Evaporative Emission Control System Vent Control Circuit Malfunction
Reviewed by ASE Certified Technician
What does this mean?
Code P0446 indicates a malfunction in the EVAP vent control circuit.
Disclaimer: This diagnostic code is part of the standard OBD2 system and can apply to Cadillac Xt4 models manufactured from 1996 to 2026. However, please note that the presence of this specific code depends on your vehicle's exact engine configuration, options, and production year.
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Common Causes
Faulty EVAP vent valve/solenoid
Damaged, chafed, or broken wiring harness
Corroded or loose electrical connector
Saturated or damaged EVAP charcoal canister
Symptoms to Watch For
- Check Engine Light is illuminated
- Strong fuel odor from vehicle
- Failed emissions test