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Titaniumboy wrote: ↑Fri Mar 17, 2023 1:05 pm These are Volvo Penta fault codes.

SPN-698 FMi 5 (Oil pressure gauge driver voltage low)

SPN 699-FMi-5 (Trim gauge driver voltage low)

I’m not sure what SPN 926 code is for.

Do you have analog or digital gauges? If you have analog gauges then the SPN 698 and 699 alarm codes might be normal and have nothing to do with your problem.

nickmaute wrote: ↑Wed May 31, 2023 11:13 pm I’d like to chime in as we’re having a similar issue.

2015 Cobalt 220S / Volvo Penta V8 270hp / 120 hours

End of last season, we started getting an intermittent alarm, “check engine” flashing across the small digital portion of our speedometer (only at about 30mph or more). No engine performance issues, no limp mode, starts and restarts just fine. We have all analog meters, speedometer has small LCD screen where you can toggle through a few readings. Determined the batteries were going (had never been replaced in almost 8 years). Replaced both. No change in performance, still drives great, starts fine, etc.

After battery replacement, Alarms still fire when north of 3300rpms, 29+mph.

Hooked to computer and codes firing are SPN 697/698/699, FMI 5 on all. All related to low voltage on trim, temp, oil. gauges. All readings in normal range. Battery voltage about 14.2 on the lcd screen.

Took it to boat dealer. They seemed to think it’s the ECM. Spoke to several other Volvo dealers around the country and all say they’ve not seen ECMs go bad like this. Also hear if ECM is bad, it won’t start and problems are worse than this. Dealer attempted to manually clear the codes with computer but they came back.

Having another mechanic check the ground connections, alternator belt tension (a Volvo mechanic in WI recommended this), change spark plugs.

Will advise if these fix anything. Hopeful additional context to a similar problem helps everyone with a solution.

nickmaute wrote: ↑Wed May 31, 2023 11:13 pm I’d like to chime in as we’re having a similar issue.

2015 Cobalt 220S / Volvo Penta V8 270hp / 120 hours

End of last season, we started getting an intermittent alarm, “check engine” flashing across the small digital portion of our speedometer (only at about 30mph or more). No engine performance issues, no limp mode, starts and restarts just fine. We have all analog meters, speedometer has small LCD screen where you can toggle through a few readings. Determined the batteries were going (had never been replaced in almost 8 years). Replaced both. No change in performance, still drives great, starts fine, etc.

After battery replacement, Alarms still fire when north of 3300rpms, 29+mph.

Hooked to computer and codes firing are SPN 697/698/699, FMI 5 on all. All related to low voltage on trim, temp, oil. gauges. All readings in normal range. Battery voltage about 14.2 on the lcd screen.

Took it to boat dealer. They seemed to think it’s the ECM. Spoke to several other Volvo dealers around the country and all say they’ve not seen ECMs go bad like this. Also hear if ECM is bad, it won’t start and problems are worse than this. Dealer attempted to manually clear the codes with computer but they came back.

Having another mechanic check the ground connections, alternator belt tension (a Volvo mechanic in WI recommended this), change spark plugs.

Will advise if these fix anything. Hopeful additional context to a similar problem helps everyone with a solution.

CobaltDeadHead wrote: ↑Fri Jun 02, 2023 8:20 am It's situations like this that caused Massachusetts to pass the right to repair law recently. The law is designed to prevent dealers and manufacturers from holding repair codes hostage and forcing people to use their service departments vs any mechanic you want or yourself. IMO this should be the law nationwide.