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P0446 Diagnostic Trouble Code Discussion for June 2009

EVAP Vent System Performance

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Trouble Ticket Help Requests for DTC P0446
Help Request Posted
2003 Chevrolet Silverado 1500 4.8L MIL Lamp on VIN: 1GCEK14VX3
P0446: EVAP Vent System Performance. came in for p0446 checked vent valve found bad replaced with updated solenoid.tested system ok test drove no concerns came back 2 days later same code checked solenoid bad again replaced again passed all test came back 2 days later p0446 again checked canister...
June 25, 2009