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Check Engine code P0499 and P0455 P0455p



could be the canister in the quarter panel under the gas door. or its solenoid on top of it. or the purge solenoid on the engine.
 
P0499 Evaporative Emission System Vent Valve Control Circuit High

[FONT=verdana, sans-serif]p0455 [/FONT]This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected.
 
I'd check the wiring at the vent valve (which Scott is kinda mentioning) and if that's sticking open causing a high, then there's both issues.
 
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