Conditions For Setting DTC
If the FTP sensor voltage is less than 0.70 volts during the DTC P0446 diagnostic test indicating a blocked vent system, DTC P0446 will set if condition exists for longer than 1 minute and 40 seconds.
If the FTP sensor voltage is less than 0.70 volts during the DTC P0446 diagnostic test indicating a blocked vent system, DTC P0446 will set if condition exists for longer than 1 minute and 40 seconds.