Error Code P0300 With Only 9000 Miles

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Oct 31, 2019 | 12:26 PM

bballmike2

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Error Code P0300 With Only 9000 Miles

New Member and hoping I can get some advice,

I have the V-10 in my 2016 MH with only 9,000 miles and while coming back from a recent trip the check engine light came on. Normal driving (55-60) on a straight Hi-way.
When I got home I checked the error code and it said P0300 Random Misfire Detected.
The motor seems to be running fine, just the light is on...
Any Ideas?? Should I take it to the dealer (not easy with a 34' MH), Some suggestions have been to reset the code and see if it comes back.

Also when I first pulled over to check everything out, fluids etc I noticed about a 1/3 of the way up the oil dipstick (Very long dipstick about 3'), about 3" long of what appears to be a burnt oil residue on the stick, is this normal??

Thanks in advance for any help??

Nov 1, 2019 | 08:48 AM

krewat

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From: Long Island USA

If it's under warranty (and it should be), definitely bring it to the dealer. That burnt residue, does it seem to be around where the dipstick tube goes past the exhaust manifold? Not that it should happen, just curious.

Nov 1, 2019 | 09:57 AM

bballmike2

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Yes, its under warranty.
Im not positive but I believe so that its towards the exhaust manifold.

Nov 1, 2019 | 10:01 AM

krewat

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Might be "normal" for that crud to accumulate there, although I wonder why it would be so hot - what oil are you using? Has it even been changed yet?

Nov 1, 2019 | 10:15 AM

bballmike2

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Yea thats kinda what I was thinking. Had it changed at 5K with what was specified.
But that not my real issue the code is what Im trying to find out more about before driving a big motorhome to the dealer....

Quote:

Originally Posted by Krewat

Might be "normal" for that crud to accumulate there, although I wonder why it would be so hot - what oil are you using? Has it even been changed yet?

Nov 1, 2019 | 10:45 AM

krewat

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From: Long Island USA

Clear the code, throw some injector cleaner in it, and then beat the ***** off it on the highway.

Usually, on the 2-valve motors, a random misfire is a vacuum leak which is usually caused by the PCV elbow at the throttle body. On the 3-valvers, though, haven't heard of any vacuum leaks.

Can't hurt to check though. Rodents, ya know?

Nov 5, 2019 | 04:18 AM

Mcrafty1

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From: 'Pitlock, Maine

I had a 5.4l 3v and it had the same 'burnt oil' on the dipstick, I have a 6.8l 3v and it too has the same 'burnt oil' on the dipstick, both instances it's where the dip stick passes close to the exhaust manifold. I don't have anything to offer on the code. It sounds like Krewat has that covered.