2016 Pontiac P0446: What It Means & Is It Safe to Drive?
P0446 on the 2016 Pontiac: Evaporative Emission System Vent Control Circuit. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
The PCM has detected a problem with the EVAP vent control circuit, often caused by a stuck or failed vent valve.
Common causes on the 2016 Pontiac
- Failed EVAP vent solenoid
- Corroded wiring or connector at vent valve
- Blocked vent due to dust, rust, or spider webs
Symptoms
- Check Engine Light
- Possible difficulty filling fuel tank (nozzle keeps clicking off)
Typical fixes
- Replace EVAP vent valve/solenoid
- Clean or clear vent and charcoal canister area
- Repair wiring
Repair cost range
For a 2016 Pontiac, repairs for P0446 typically fall between $150 and $450, depending on the root cause and labor rates in your area.
Known issues on Pontiac
Pontiac P0446 EVAP vent solenoid fault follows the GM pattern—check for corrosion at the canister vent solenoid connector. On Montana minivans with rear HVAC, the canister is in an exposed rear underbody location that sees more road debris and moisture.
Most commonly affected models
G6 2005–2010Torrent 2006–2009Montana 2005–2008