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SPN3050/SPN3051 Codes/Service Required


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Posted (edited)

I’ve got a 2009 Wakesetter VLX that threw a SPN3050 FM1:11 code while surfing Saturday as an inactive code but said service required. I cleared the warning twice as we were finishing up for the day. 

I Pulled the kids all day Sunday tubing and just running around the lake and no more warnings. 
 

Then today we surfed for about an hour and once we finished and powered up I get another red service due message. Now I’ve got a SPN3051 code in inactive codes in addition to the 3050 code. 

What are the odds I have 2 bad o2’s or something else going ? I’m just trying to figure out where to start but it seems to only throw this message when surfing after some time. 
 

Thanks 

Edited by JaySmith
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16 hours ago, JaySmith said:

What are the odds I have 2 bad o2’s or something else going ?

Anything is possible... read on.

 

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Thanks for the reply. I actually sent him a private message last night trying to get additional info regarding his scenario.

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1 hour ago, JaySmith said:

Thanks for the reply. I actually sent him a private message last night trying to get additional info regarding his scenario.

Since your boat is 12 or so years old, it is always worth cleaning the contacts in connectors.  It wouldn't hurt to check the O2 sensor wires to make sure that everything has good contact.

Sending a private message might answer your question for you, but doesn't leave a trail for others to follow if they have the same problem.  It might be better to tag him here to try to spook him up.  Since he only posted three times and all of them were in that thread, he may not answer.  @tsholin, are you available?

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Good point. Thanks for tagging him. I’ve checked the wires, etc and next step is to pull O2’s. I just found it odd to have one bank throw a code one day and the other bank throw a code the next day. 

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You may want to check the condition of the catalyst in the exhaust manifolds, especially if it is a 5.7L engine and the updated cat exhaust plumbing has not been done yet.

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@csleaver, thanks for the reply. I purchased the boat 3 years ago and the updated plumbing hasn’t been performed to my knowledge.

How would I go about checking to see if it’s been done? I do have the 5.7.

Also, how would I go about checking the condition of the catalyst?

Thanks,

Jay 

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To check the catalyst remove the O2 sensors and use a flashlight or scope camera to check the substrate.  It should be look like a flat and concentric mesh on both sides.  Damaged catalyst substrate looks very jagged, or it may be completely missing.

The 5.7L ETX CAT replumb kit changes where the hoses connect from the thermostat housing to the exhaust manifold.  The easiest way to identify if it has been done already is to see if the cooling hose on the top of the exhaust manifold connects directly to the bottom of the down pipe on the end of the exhaust manifold.

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