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Author Topic: Crank Shaft Position Sensor  (Read 262 times)
BigBlue
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« on: June 28, 2020, 10:42:42 pm »

I have a 2018 200 Verado L4
First time out this season she started up no problem, cruised her around just to make sure things were operating OK no issues.
Got her up on plane and opened her up to WOT. And the motor started studdering and I got a fault code on Merc Monitor about faulty Crank Shaft Position Sensor.
I live in a small town with 1 boat dealer. I called to get it in they told me 8-10 weeks. Not wanting to live with out my boat that long did the next best thing. Bought a new sensor and replaced it.
Have taken it out a few times and every time. Even with the new sensor I got to WOT the alarm goes off motor studders, I come off the throttle to about 3/4 let her run like that for about 5 min alarm goes away and boat is fine for the rest of that run even at WOT. As soon as I turn the motor off and start it up again. I have to go through the hole thing all over again.  WOT throw alarm, back down wait 5 until alarm goes away, then I can go right back to WOT with out any issues. I really don't want to give up my boat for damn near the whole summer. So any insight would be awesome.
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paulswagelock
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« Reply #1 on: June 29, 2020, 09:46:26 pm »

Did you try replacing the camshaft sensor?
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BigBlue
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« Reply #2 on: June 30, 2020, 12:16:41 am »

So a bad Camshaft sensor could trip a bad crankshaft code?
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paulswagelock
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« Reply #3 on: June 30, 2020, 10:20:46 pm »

I read in another forum this same scenario, and the fix was the camshaft sensor. They both report to the Ecu and the claim was they are interrelated. Just sharing, no guarantees.
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Wirenut
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Location: Ocean city, md
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« Reply #4 on: July 01, 2020, 07:50:06 pm »

I have the same engine and mine will sound that alarm once or twice a season.I shut the motor off,restart and it goes away.I have tested the sensor and it is within specs.
Next time it happens,try shutting it off for about a minute.Then restart.
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