We just replaced the DEF header unit as that’s why we’ve been told it could be but turns out it’s still doing the same thing so what is happening we have 3 codes showing
AFT SCR OPERATOR INDUCEMENT 3712
Engines protection torque 6255
AFT Scr operator inducement severity. 6254!
I have the check and stop light on the dash also the orange light for the DEF is flashing! The guy changed the head unit cuz lots of people said that is a problem. But it is still doing same thing so any other advice? If it was wiring wouldn’t it read short circuit etc,,..
2024 4900
Discussion in 'Western Star Forum' started by Perchie15, Apr 1, 2026 at 5:13 PM.
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