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SPN 4237 – FMI 1 – Adaptive Learn Low Bank 1


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kmw072671

Hi All,

I'm a new Malibu owner of a 2020 22 LSV, bought boat new at dealer last fall and have 20 hours on it so far.  Last weekend a fault code came up on the engine alarm:

SPN 4237 – FMI 1 – Adaptive Learn Low Bank 1 - could the below be the reason of the following issues (running rich):

·        Bad O2 sensor in exhaust

·        Stuck open fuel injector

·        High fuel pressure

The engine diagnostics shows fuel pressure @ 57 psig, I have read 42-45 is normal?  What should it be?

The fault is no longer active so maybe just a fluke?

 

Also, my wedge suddenly does not  auto deploy with the preset for wakesurfing "3".  It did in the past but last weekend just sat in the "lift" position without moving to "3" once under way, any suggestions?

Thanks for any help!

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8 hours ago, kmw072671 said:

The engine diagnostics shows fuel pressure @ 57 psig, I have read 42-45 is normal?  What should it be?

The newer engines are 4 Bar (58.8 PSI) systems, so your pressure is probably OK.

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23LSVOwner

Have your dealer check the ECM calibration version. IIRC there is a fairly new one that addresses that code.

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  • 4 weeks later...
MuchoAloha

@kmw072671 had a very similar issue pop up. How did yours get resolved and what was the issue? Thanks in advance.

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Same here on my 2021 22LSV. It only happens at low speed. When i turn the engine off and on again everything is fine again. Any idea what it is? 

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Same here on the low left bank.....  Spent the past year with getting check engine lights and cutting my power.  Several software updates (most recently last month) and it seems pretty stable for now.  Also had a bad fuel pump replaced last fall.  First year M5Di engine problems I guess?

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