Hi can anybody help me out there ?? we own an R Vision Trail lite 2001 with 8.1 Chevy Vortec engine on a workhorse chassis, The camper has been absolutely fine until i had to move it the other day and the Reduced power light appeared along with the Service now light. When i parked it up the previous time it was running great as i had just given it a run. I can now only get around 2000 rpm max i have pulled the codes from the OBD and they are 1120 1221 1515 the only thing i done differently when i started it when the fault occured was as soon as i put the ignition key in the ignition i started the camper rather than waiting for the self check cycle to complete,The fault code that will not clear at all is 1221