Originally Posted by Cranberry

Lift your oil refil cap, is there foam or some sort of gunk residue under the cap? If possible upload a pic of what the oil under the cap looks like. My first Z was throwing the same code and it turned out to be a head gasket leaking coolant / oil into the wrong areas. Was reading the pressure loss and putting me in limp mode. Tphe tall tail sighn is a foam substance boiling to the top of your oil, you can see it form on the oil cap usually