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Po4db code since i install the turbosmart bov and k&n air cold filter... I need help, how can i fixed
Did your bov come with the resistor? Is it attached properly? Was the battery disconnected when you did the install?
 

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got this from another forum hope it helps

( P04DB - Crankcase Ventilation System Disconnected
Description: This DTC sets when the crankcase ventilation sensor voltage drops below 2.5 V. Possible Causes:
VBPWR circuit open
Diagnostic Aids: Application Key On Engine Off Key On Engine Running Continuous Memory All GO to Pinpoint Test C
)
 
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