P0446 when fuel drops below 1/2 tank
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P0446 when fuel drops below 1/2 tank
2009 Suburban 1500. CEL comes on with P0446 approximately when fuel goes below half tank.
I cleared the code and everything was fine for 4000 miles when I kept fuel above half full.
Which EVAP system component would be the most likely suspect -- the vent valve?
I cleared the code and everything was fine for 4000 miles when I kept fuel above half full.
Which EVAP system component would be the most likely suspect -- the vent valve?
Last edited by woodyguthrie; Aug 16, 2025 at 10:25 AM.
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