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2002 Honda 225 PGM-FI alarm.

Old 09-13-2018, 09:11 AM
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Default 2002 Honda 225 PGM-FI alarm.

I am getting a PGM-FI alarm from my 2002 Honda 225 hp. It only comes on after idling for awhile. The high pressure pump and filter have been replaced in the last year. Is there a sensor that monitors the fuel pressure to the injectors?
Old 09-13-2018, 01:25 PM
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My immedite thought is the O2 sensor has gone. Do you get a 1 second on, 1 second off beep?

The high and low pressure filters needs replacing every year (regardless of what Honda say) so it may be worth doing that again - but my money is on the O2 sensor if it only alarms having idled for a while.
If you restart the engine,get straight to motoring (not idling) and do not have an alarm until you come back to idle then I'd say almost certainly the O2 sensor.
5 minute DIY swap.

There are a number of other small filters and screens that you can check (quite involved) as they can put too much pressure into the system when blocked ,and you can test the fuels pressure at the test port on the pump...... but the easiest,although not cheapest, thing to try fist is a new sensor.

Last edited by metalchicken; 09-13-2018 at 01:35 PM.
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Old 09-13-2018, 02:22 PM
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Thanks for the quick reply. Makes sense to me. I'll try to confirm as suggested and then decide. This being an O2 sensor on a marine application Honda wants 3X the usual $$.
Old 09-13-2018, 02:58 PM
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I'm currently running a walker products sensor (part number 932-24008 ..... Your part number may be different) which has been good for the 25 hours it's been fitted.
Old 09-15-2018, 11:36 AM
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Thanks again Metalchicken. It is definately the O2 sensor. I pulled it and cleaned it up and the alarm went away for now. I know I need to replace the sensor soon.
Any suggestions on cross referencing automotive sensors. The equivalent year Odyssey sensor, my 225 is a 2002, runs $30-$40 while boats.net gets $186, go figure. Looks like any other honda sensor with a 4 wire waterproof plug except the wires are only about 6" long for the outboard. I believe this would be considered an "upstream" application. Thanks

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