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CCTMSTR, GM Certified Master Technician
Category: Chevy
Satisfied Customers: 395
Experience:  GM Master Technician.ASE Master.Advanced Level L1. NV State G2 Emission Inspector
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2004 chevy: that has code po496 and when fill up with fuel is

Resolved Question:

What is wrong with my 2004 chevy that has code po496 and when fill up with fuel is hard to start .
Submitted: 7 years ago.
Category: Chevy
Expert:  CCTMSTR replied 7 years ago.
P0496 is the evap canister purge solenoid.This solenoid is located on the engine.It is turned on and off (called pulse width modulation).It normally should not allow vacuum when off. The code P0496 is evap flow during non-purge event.To make it simple the valve is stuck allowing vacuum to reach the fuel tank.It's like an additional fuel line when not operating properly.replace the canister purge solenoid and clear the code.
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