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crmech7
Senior Member

51 Posts

Posted - 02/16/2018 :  2:27:38 PM  Show Profile  Visit crmech7's Homepage  Reply with Quote
On my 2011 BB Vision with the 6.7 Cummins, I'm getting a code saying the crankcase pressure is high and that the ccv filter requires maintainance. Before changing it, an amber light came on after 10 minutes of driving saying least severe. After changing it a red light came on saying most severe level. Am I missing something besides the filter itself?

TL;DR: High crankcase pressure, new CCV filter didn't fix it.

buster133
Top Member

USA
512 Posts

Posted - 02/16/2018 :  2:36:11 PM  Show Profile  Reply with Quote
Is this a pre-DEF Cummins? Last time I saw this code on one of mine it ended up being a blown freeze plug that was filling the top end with coolant

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baptistbusman1
Senior Member

USA
175 Posts

Posted - 02/16/2018 :  3:36:06 PM  Show Profile  Reply with Quote
Yep, the vent hose is probably clogged up. Had the freeze plug rust through in the head and antifreeze filled up the top end, and lower end lol. Good luck.

I was formally Baptistbusman. However, I lost my password, and had not updated my email address.

Here is a link to my old posts. http://www.schoolbusfleet.com/forum/search.asp?mode=DoIt&MEMBER_ID=1846
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wrenchsnapper
Active Member

27 Posts

Posted - 02/20/2018 :  8:10:59 PM  Show Profile  Visit wrenchsnapper's Homepage  Reply with Quote
The sensor might be bad. It should read zero with engine off. Ive had a few go bad already. If the really is excess crankcase pressure then you have some broken rings and need to fix them asap before it wipes out the cylinders.
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