Hello all, I started a thread a week ago or so about the sour smell from my exhaust after starting the engine cold. After reading your comments I agree it was the DEF not flowing due to being frozen. However, I got in my truck tpday to see the check engine light is on and I then checked the message on the evic. It says "Service DEF System". Not sure how this is going to play out, I called my service center at the RAM dealership (11:05) and they said to bring it in today (15:00) so they can look at it. I'll post results when I hear back.
As an additional note, I was worried about the DEF because of its freezing point, so I never had the DEF tank over 50% since the end of October. So I have followed RAM's instructions on winter use. Also o have been plugging in the block heater below -15c all year.
As an additional note, I was worried about the DEF because of its freezing point, so I never had the DEF tank over 50% since the end of October. So I have followed RAM's instructions on winter use. Also o have been plugging in the block heater below -15c all year.