Normal
The ABS DTC can be ignored; that is unrelated network code that can set when there is high network traffic.Since emissions requirements now dictate that the crankcase ventilation system be monitored for leaks, new strategies were implemented in 2015/2016 to determine if the system has been disconnected or modified. A Crankcase Pressure Sensor (CKCP) is used to monitor the operation of the PCV system. Dirty side disconnects are detected during engine cranking by looking for the absence of a crankcase pressure dip or pulsation. Clean side disconnects are detected during normal driving by detecting the absence of a pressure drop under higher airflow conditions. DTC P04DB sets when the PCM determines that the variance between the values provided by the CKCP and the expected results exceed the allowable threshold. The most likely reason that intake system modifications are causing this DTC is unexpected airflow disruptions or turbulence in the airflow. The factory calibration is created using only the factory components, so any changes that an aftermarket intake make to operation or airflow need to be accounted for by the intake manufacturer.As far as a tune, the easiest thing the tuner could do would be to turn off the PCV monitor and related DTCs. There may be legal implications with doing so though.
The ABS DTC can be ignored; that is unrelated network code that can set when there is high network traffic.
Since emissions requirements now dictate that the crankcase ventilation system be monitored for leaks, new strategies were implemented in 2015/2016 to determine if the system has been disconnected or modified. A Crankcase Pressure Sensor (CKCP) is used to monitor the operation of the PCV system. Dirty side disconnects are detected during engine cranking by looking for the absence of a crankcase pressure dip or pulsation. Clean side disconnects are detected during normal driving by detecting the absence of a pressure drop under higher airflow conditions. DTC P04DB sets when the PCM determines that the variance between the values provided by the CKCP and the expected results exceed the allowable threshold. The most likely reason that intake system modifications are causing this DTC is unexpected airflow disruptions or turbulence in the airflow. The factory calibration is created using only the factory components, so any changes that an aftermarket intake make to operation or airflow need to be accounted for by the intake manufacturer.
As far as a tune, the easiest thing the tuner could do would be to turn off the PCV monitor and related DTCs. There may be legal implications with doing so though.
