Why does my GMC Duramax have low Def range?
Why does my GMC Duramax have low Def range?
There is a calibration for the vehicle computer update .This will need to be done by a dealer. dealer may encounter a customer vehicle with a DEF (diesel exhaust fluid) low message, speed limiting message, or a DEF range not resetting after a refill.
Why does my GMC Truck have a Def warning?
In operating temperatures of -9C / 15F or less, customers may comment on an “Exhaust Fluid Range” message displaying on the DIC even though the DEF fluid has been filled or is known to be full. This is likely because the truck is in the “Frozen Tank Status”. This is usually an intermittent condition.
Why does my GMC 2500 have a Def low message?
During cold temperature conditions a dealer may encounter a customer vehicle with a DEF low message or a speed limiting message even if the vehicle is known to be full of DEF. Additionally, the dealer may encounter a customer vehicle with a DEF range that does not reset after a refill event.
What does Def mean in Exhaust Fluid quality?
(Exhaust Fluid Quality Poor-see owner’s manual now) A DEF Quality message – Makes sure DEF fluid is lowering NOx emissions to a satisfactory level (usually has DTC). It is important to know the exact DIC message so correct diagnostics are completed. Please see SI documents (NNN) NNN-NNNN (NNN) NNN-NNNN and (NNN) NNN-NNNNfor clarification.
In operating temperatures of -9C / 15F or less, customers may comment on an “Exhaust Fluid Range” message displaying on the DIC even though the DEF fluid has been filled or is known to be full. This is likely because the truck is in the “Frozen Tank Status”. This is usually an intermittent condition.
There is a calibration for the vehicle computer update .This will need to be done by a dealer. dealer may encounter a customer vehicle with a DEF (diesel exhaust fluid) low message, speed limiting message, or a DEF range not resetting after a refill.
During cold temperature conditions a dealer may encounter a customer vehicle with a DEF low message or a speed limiting message even if the vehicle is known to be full of DEF. Additionally, the dealer may encounter a customer vehicle with a DEF range that does not reset after a refill event.
Are there any problems with the Duramax DEF tank?
Since my Duramax was less than 6 months old it began to have problems. First with dash warnings of “Exhaust Fluid Quality Poor See Owners Manual Now”. This occurred with the DEF tank 3/4 full with new factory Chevy DEF. The Chevy mechanics at the time didn’t really understand the whole DEF system and had my truck for more than a week.
