What does poor quality exhaust fluid warning light mean?
Well, driving home today on the interstate from my weekly trip to the airport, I got the “Poor Quality Exhaust Fluid” warning light. Prior to this I have never gotten any kind of warnings or messages.
Why is my Def warning not clear on my GMC?
If the vehicle has been driven for a few miles, the ignition has been turned off (allowing the ECM to go to sleep for at least 5 minutes), and the DIC will not update, the message may have become latched into the ECM. There are three different reasons for a DEF (Diesel Exhaust Fluid) warning message to set.
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.
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.
What does the exhaust fluid quality poor message mean?
An Exhaust Fluid Quality Poor message can be displayed with no DTCs. The Exhaust Fluid Quality Poor DIC message notifies the customer that the ECM has detected a drop in the SCR NOx reduction efficiency. This PI is to assist with vehicles that have difficulty completing the Reductant Fluid Quality Test
Is there a warning light for diesel exhaust fluid?
For DEF (diesel exhaust fluid) system Quality or Tampering messages follow the current SI diagnostics, and review the newest version of PIP4829. This PI references an updated calibration available in TIS2WEB on 1/24/2011. This is an improvement over previous calibrations but is not the final update planned.
If the vehicle has been driven for a few miles, the ignition has been turned off (allowing the ECM to go to sleep for at least 5 minutes), and the DIC will not update, the message may have become latched into the ECM. There are three different reasons for a DEF (Diesel Exhaust Fluid) warning message to set.
Is the Def fluid quality poor on a GMC Duramax?
According to Dennis Dillon techs who are (supposed) to be GM certified. They said there is no DTC errors. Those were cleared. #2 NOx sensor replaced and on the DIC portion it shows def fluid quality poor and shows speed restriced to 55mph.