Circuit failure seek service immediately??!!
01-10-2021, (Subject: Circuit failure seek service immediately??!! ) 
Post: #1
Circuit failure seek service immediately??!!
I changed my fuel sending unit on my 2011 t660 kw and now I'm getting circuit failure seek service immediately on my dash. Any ideas? Truck ran fine and no dash circuit failure prior to swap.
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01-10-2021, (Subject: Circuit failure seek service immediately??!! ) 
Post: #2
RE: Circuit failure seek service immediately??!!
Forgot to mention it comes on when I release my parking brake only
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01-10-2021, (Subject: Circuit failure seek service immediately??!! ) 
Post: #3
RE: Circuit failure seek service immediately??!!
Can you see the active DTC?
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01-10-2021, (Subject: Circuit failure seek service immediately??!! ) 
Post: #4
RE: Circuit failure seek service immediately??!!
I know this may be a longshot, but since cab control unit are flaky. I suggest disconnect power from batterie's for 30 min and see if it reset's.


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 Thanks given by: Mav
01-10-2021, (Subject: Circuit failure seek service immediately??!! ) 
Post: #5
RE: Circuit failure seek service immediately??!!
I cleaned battery post and cables and problem went away. Disconnected for 15 min. Thanks bud
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 Thanks given by: Mav
01-11-2021, (Subject: Circuit failure seek service immediately??!! ) 
Post: #6
RE: Circuit failure seek service immediately??!!
(01-10-2021 )jimeneztrans84 Wrote:  I cleaned battery post and cables and problem went away. Disconnected for 15 min. Thanks bud

paccar cab controllers are known for ghost errors and flaky software. It is common to have to remove the battery terminals for 30 minutes to reset them sometimes.

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