Check engine light.

[evanrude]

I have 2009 SAN 210 no LINC, with the Excalibur 343 in it. I am having an issue....boat runs fine, get up to 3000rmp and the check engine light comes on and is accompanied by continuous beeping. Boat continues to run fine. No power reduction. All the guages read good. All fluid levels are good. Any thoughts on what is causing the light to come on and the beeping?

[NautiqueJeff]

Can only be two things. It is either the temperature SWITCH, not sensor, or the oil pressure SWITCH, not sensor.

[evanrude]

Can only be two things. It is either the temperature SWITCH, not sensor, or the oil pressure SWITCH, not sensor.

I was able to catch on the display something like “knock sensor”. After searching around a bit, I believe that’s what my problem is. Thanks for your help!

[jkallen21]

I just fixed the knock sensor on my 2006. In my case it was simply a wire that had come loose. But I learned that there are two different alarms for this.

1. The knock sensor can’t be reached (my case). It happens the second you press start (before the engine even starts).

2. The sensor is hearing a knock. Seems to happen as you load up the engine (your case). I’ve read on here that it can be a dinged prop, a bad sensor, or actual engine knock.

If you don’t feel any vibration, it might not be the prop but double check.

Next, I’d add new fuel and add octane booster. Ask the gas station if anyone else reported engine issues.

If it’s a bad sensor, it’s not going to be fun. You’ll have to remove the intake manifold and the bolts are under a LOT of wiring and hoses. You also have to remove the file rails on each side - not hard to do, but hard to get to that point.

[Destryg]

I had a similar problem but it was happening under load or high throttle. Replaced knock sensor and it was fine.


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[CincinnatiCC]

Same here. Knock sensor on my 206 with 343 engine has gone out several times.

[evanrude]

Same here. Knock sensor on my 206 with 343 engine has gone out several times.

When you replaced the knock sensor, did the check engine light go away and the beeping stop? Or did u have to take it to get the codes read/cleared ?

[jkallen21]

On mine, where the sensor could not be reached (heard), I had to reset the codes. I reattached the wire but that offered zero relief until I reset it. But remember, in my case, the sensor could not be read so I would get the alarm before starting the engine.

[evanrude]

Update....Took boat to dealer, they hooked it up to the computer. Turned out to be starboard knock sensor. I had them change the port knock sensor while they were at it. Problem solved!