i have a 8fgcu18 sn 18199. truck has a code r-off when initially turned on. goes away after about 5 seconds or so. no CEL. i got into the dash and looked at the previous 10 error codes and this did not come up at all which leads me to believe it isnts a error code but something else. anyone know what this means? also the only code that came up in the last 10 was code 52-2 which is for the yaw rate sensor and it came up multiple times with many hours in between each one which makes me believe its an ongoing problem.