My 600 is running great, but the engine service light came on, so I tripped the key 3 times and a P0088 code came on, followed by "------", and then "donE". Can someone please explain this? The truck has just under 15K on it, and just keeps getting better. I just returned from a 2K trip, towing/hauling near 4K, doing 70-85mph on winter fuel, pulling an honest 15mpg with some headwind. Truck has 3.73s and is an automatic. I can see it pulling more like 19 when running empty, even on winter fuel. Maybe in light of this code, I should mention also that I have the TS box, (rarely even use it), and the cat seems to have fallen off somewhere, and a test pipe mysteriously appeared in it's place. Could any of these be factors in the code appearing? Just changed oil and fuel filter, but the light and code were there already. Lovin this truck! Thank you.

 

P0088 Fuel Rail Pressure Too High