Hello, i need help. It shows that SCR System Fault Engine will Derate in < 60 mins.
Def gauge isn't working at all.. what it might be?
Def
Discussion in 'Questions From New Drivers' started by Erjonb, May 9, 2021.
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Need more info, what engine/truck/year/model? how many miles?
That said considering my own trucks massive list of problems it could be #### near anything. Cheapest parts to rule out are the quality sensor, the doser and the NoX sensors. From there it gets...pricey.baha Thanks this. -
Oh yea my bad, its a volvo 2012 660k miles
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You said the gauge isn't reading, is the DEF tank actually empty?
If the DEF tank module isn't reading properly on some trucks the gauge needle can point straight down or it'll have a light that will illuminate or flash. -
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No, it was half, and now its right below E. There's no other lights
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If it was at half and then suddenly dropped to Empty, I wonder if the sensor got hung up at half a tank, then freed up and dropped once the tank was nearing empty? Cheapest and quickest thing to try if that's the case would be to put a couple gallons of DEF in the tank and see if that does anything.
gentleroger and SoulScream84 Thank this. -
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