bigbhb Posted June 3 Share Posted June 3 Does anyone know what code 251 is on a 2006 Holiday Rambler Endeavor Cummins 8.9. Link to comment Share on other sites More sharing options...
Scotty Hutto Posted June 3 Share Posted June 3 What are you reading the code with? Scangauge? BlueFire? Silverleaf, ABS flash code? Generator flash code? etc? Link to comment Share on other sites More sharing options...
cbr046 Posted June 3 Share Posted June 3 Your best bet is to create a Cummins QuickServe account - https://quickserve.cummins.com/info/index.html - and look it up yourself. You'll need your engine serial #. On the Service tab there's a tab for 'Fault Code Search'. Using my engine I tried Fault Code 251 and it doesn't exist for my 2003 ISC engine. - bob Link to comment Share on other sites More sharing options...
Dr4Film Posted June 3 Share Posted June 3 Is that an engine code, transmission code, generator code, ECM code, TCM code or your ATM code? 😈 Link to comment Share on other sites More sharing options...
bigbhb Posted June 3 Author Share Posted June 3 Cummins 8.9. engine code. Scan gauge. Link to comment Share on other sites More sharing options...
vanwill52 Posted June 4 Share Posted June 4 I'm not sure I remember correctly, but I think that error is "Invalid Voltage" and pertains to the ECU power supply. Whatever error number I had, it was the warning that my ECU was failing. It failed catastrophically about two years later. $8K repair. Link to comment Share on other sites More sharing options...
MHRookie Posted June 4 Share Posted June 4 It says the “real time clock” for the ECM has lost power. Not a performance type of code. Link to comment Share on other sites More sharing options...
6Wheels Posted June 5 Share Posted June 5 Maybe replace a button battery on the Mobo? CR2032 Link to comment Share on other sites More sharing options...
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