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sd code 25 problem

joel huttunen

Newbie
Joined
Mar 5, 2019
Messages
3
Age
26
Location
finland
Country
Other
Snowmobile
Yamaha Sidewinder mtx162 stage 4
hey! i figured to ask here if anybody else has had this issue . i keep getting sd-code 25 at 100km/h when pushing fullthrottle and it cuts power , i know its upstream pressure code and have switched for new pressure sensor wich is in the front of the sled and i have switched for better hose clamps and recently also checked all the throtthle body connections aswell . running stage 4 tune atm . i cant seem to figure out the problem and any help would be very nice!
 

I had code 25 was very cold out boost tubes full of oil and moisture .
I took it all apart cleaned all the boost tubes boost cesors and lines.
Then vented crankcase to atmostphere and oil tank vented to atmostphere after the check valve .
Pluged of oil tank were it vented to intake. Works great no more codes and clean turbo and intake .
 
Finally the issue is solved , ended up going thru all kinds of stuff but the issue ended up being in the tune , so did , all tubes new , changing out pressure sensor etc . hopefully my season will start now!
 
Finally the issue is solved , ended up going thru all kinds of stuff but the issue ended up being in the tune , so did , all tubes new , changing out pressure sensor etc . hopefully my season will start now!

I had seen a few tunes that had to be redone to cure this issue.
 
yeah i started diagnosing the issue last spring , lots of grey hairs and long evenings later its fixed :D
 


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