Trouble Codes ..... Help

[trailshredder]

I had a SES light come on so I had Autozone do a scan and got 5 codes returned. I never trust their code descriptions. Was hoping someone could give me GM's real description. The codes are;

P0193
P0380
P0540
P0090
U1800

Thanks!

 

[DEERE3594]

P0193 Fuel Rail Pres Sensor Circ Hi Input
P0380 Glow Plug Circ Error Circ A
P0540 Manifold Intake Air Heater Circ
P0090 Fuel Pres Reg Ctrl Circ
I couldnt find the U1800, could it be U0180?
Dose any of that help?

 

[trailshredder]

Definetly was a U1800. Thanks for the info on the other codes. I asked AZ if they could reset them. When he tried, it was real strange. My fuel guage jumped and then showed empty. His scanner gave him an error and wouldn't read the errors again. As soon as he unplugged, my guage went to normal but he couldn't get it reset. I was hoping to reset them and then check them again in a couple weeks and see which ones re-appeared. Is it safe to assume that not all those codes could be currently wrong with it, that they could be codes from a year or so ago. Is there a way to clear them without a scanner?