I'm getting all sorts of issues with my 773T. Getting codes: 04-21, 05-21, 07-21, 08-21, 09-21, 11-06, 12-21. So far know a few of them are high pressure, but don't know what's really causing it. Any ideas? I have about 1500 hrs on it. Thanks in advance.
Sounds like a bad ground or power connection. check the wiring near the battery for looseness/corrosion first.
Is everything still functioning properly?