Bswope

P0237 Map sensor voltage too low
P0193 Fuel pressure sensor voltage too high

Loaded the Smarty in,pulled the fuses and and unhooked the TST using the bypass harness and fired the truck up the other morning (pritty cold out) and went in the house to let er warm up abit and when i got in the truck the check engine was on so i shut er down and checked with the Smarty and cleared them out. Anyone have these before, anything to worry about?

Thanks
Buddy

jwb600

I have the same year truck and get the po193 still sometimes also. I dont know why but it happens. I think thats a usual code that the tst throws but I dont even have a tst anymore but I have ran one. the other code I have no clue on. do you have a modded pump? I get some different rail pressure codes and I dont even have a pressure box anymore either. the codes bother me too but I stopped getting worried about them a long time ago

STR8TORQUE

I have gotten the P0193 code a few times. It only seems to happen when I start it below 30 outside and let it warm up.