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frozen def

  1. DEF reading 100% full, when only ~1/4 full?

    RAM 1500 Diesel General Discussion
    I've seen lots of posts on here where DEF gauges are reading too low...consensus seems to be it froze and didn't read a fill, or never dropped level and usually related to very cold weather. I can understand the logic there. My DEF tank is about 1/4 full, and I always keep it between 1/4 and...
  2. DEF, the Weakest link in out trucks.

    RAM 1500 Diesel Maintenance
    (-35c) My wife was on her way to work yesterday when the MIL came on. Stopped by the dealership, they quickly scanned it. Truck said "replace PCM". Service manager said that it didn't make sense, because I have already replaced my PCM @ approx 15k km, and they seldom have to replace pcm's...