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P0441
Flow chart did not help in this case, because when the test asks one to command the purge solenoid on, that equals 100% PWM. The vacuum switch would show open/purge (I forget which) at that PWM, but repair info. said it is supposed to open even at a 25% PWM co... Login to read more. 
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| Engine | 3.8 L |
| Trans | 4-speed Automatic (Electronic) |
Vehicle Data
1996 Buick Park Avenue 3.8L
| Engine | 3.8 L |
| Trans | 4-speed Automatic (Electronic) |
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