What causes constant crankcase pressure code?I have a 2008 450 isx cummins with 612000 miles. I keep getting engine fault code for crankcase pressure. when i change the f...
Answer to: coolant pushing back thru reservior tank cap.when i had this problem it was a leak in my egr cooler. 2008 isx. sometimes it would suck the water back over. it will start leaking more and more coolant.