Anyone had this message come up on their Duramax? Changed fluid but message still says fluid is poor.
bubba1
Here is some information on the system.
Diesel Exhaust Fluid (DEF) Warning Strategy (DEF Quality)
A supply of clean, fresh Diesel Exhaust Fluid (DEF) is critical for optimum Selective Catalyst Reduction (SCR) efficiency. SCR efficiency is determined by monitoring the Nitrogen Oxide (NOx) sensors located upstream and downstream of the SCR. This vehicle provides the driver with an elaborate series of prompts and warnings that are initiated when the Engine Control Module (ECM) detects a drop in the SCR NOx reduction efficiency suggesting a diluted or contaminated DEF supply.
When contaminated or diluted DEF is suspected, the ECM initiates the DEF Quality warning process. Once initiated, DEF quality warnings grow increasingly more serious as the vehicle continues to be driven. The vehicle's current DEF quality warning status is displayed on the scan tool. When a drop in SCR efficiency is detected, the normally OFF Reductant Field Quality Warning Indicator Command will display Warning Level 1 through Warning Level 5 depending on the number of miles driven, the number of ignition cycles, and if a refueling event was detected. The series of DEF Quality Warnings alert the driver that DEF system service is urgently needed.
Warning Level 1
Warning Level 1 is triggered when the ECM first detects the SCR efficiency is below a calibrated value. The Driver Information Center (DIC) displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•89 km/h (55 mph) Max Speed on Restart
The messages remain on the DIC until acknowledged by the driver. The DEF Indicator in the instrument panel is illuminated.
Warning Level 2
Warning Level 2 is triggered when the distance driven since receiving the first DEF poor quality message exceeds approximately 805 km/h (500 mi). The driver will hear 4 chimes on entering Warning Level 2. The DIC displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•89 km/h (55 mph) Max Speed on Restart
The messages alternate every 5 seconds until acknowledged by the driver; however, the 89 km/h (55 mph) Max Speed on Restart, remains displayed on the DIC. The DEF Indicator in the instrument panel is illuminated.
Warning Level 3
Warning Level 2 automatically advances to Warning Level 3 at the next ignition cycle. The driver will hear 4 chimes on entering Warning Level 3. The series of 4 chimes is repeated 3 times during each ignition cycle. The DIC displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•Speed Limited to 89 km/h (55 mph)
The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 89 km/h (55 mph), remains displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously.
Vehicle speed is limited to 89 km/h (55 mph).
Warning Level 4
Warning Level 4 is triggered when the distance driven since receiving the first DEF Quality Warning message exceeds approximately 1,609 km (1,000 mi). The driver will hear 4 chimes on entering Warning Level 4. The series of 4 chimes will repeat 3 times during each ignition cycle. The DIC displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•Speed Limited to 89 km/h (55 mph)
•6 km/h (4 mph) Max Speed Next Fuel Fill
The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 89 km/h (55 mph), and 6 km/h (4 mph) Max Speed Next Fuel Fill, remain alternately displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously.
Vehicle speed is limited to 89 km/h (55 mph).
Warning Level 5
Warning Level 5 is triggered when the distance traveled is greater than 1,609 km (1,000 mi) and the ECM detects a fuel fill event. The driver will hear 4 chimes on entering Warning Level 4. The series of 4 chimes will repeat every 3 minutes. The DIC displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•Speed Limited to 6 km/h (4 mph)
The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 6 km/h (4 mph), remains displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously.
Vehicle speed is limited to 6 km/h (4 mph) maximum.
Diesel Exhaust Fluid (DEF) Warning Strategy (DEF Quality)
A supply of clean, fresh Diesel Exhaust Fluid (DEF) is critical for optimum Selective Catalyst Reduction (SCR) efficiency. SCR efficiency is determined by monitoring the Nitrogen Oxide (NOx) sensors located upstream and downstream of the SCR. This vehicle provides the driver with an elaborate series of prompts and warnings that are initiated when the Engine Control Module (ECM) detects a drop in the SCR NOx reduction efficiency suggesting a diluted or contaminated DEF supply.
When contaminated or diluted DEF is suspected, the ECM initiates the DEF Quality warning process. Once initiated, DEF quality warnings grow increasingly more serious as the vehicle continues to be driven. The vehicle's current DEF quality warning status is displayed on the scan tool. When a drop in SCR efficiency is detected, the normally OFF Reductant Field Quality Warning Indicator Command will display Warning Level 1 through Warning Level 5 depending on the number of miles driven, the number of ignition cycles, and if a refueling event was detected. The series of DEF Quality Warnings alert the driver that DEF system service is urgently needed.
Warning Level 1
Warning Level 1 is triggered when the ECM first detects the SCR efficiency is below a calibrated value. The Driver Information Center (DIC) displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•89 km/h (55 mph) Max Speed on Restart
The messages remain on the DIC until acknowledged by the driver. The DEF Indicator in the instrument panel is illuminated.
Warning Level 2
Warning Level 2 is triggered when the distance driven since receiving the first DEF poor quality message exceeds approximately 805 km/h (500 mi). The driver will hear 4 chimes on entering Warning Level 2. The DIC displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•89 km/h (55 mph) Max Speed on Restart
The messages alternate every 5 seconds until acknowledged by the driver; however, the 89 km/h (55 mph) Max Speed on Restart, remains displayed on the DIC. The DEF Indicator in the instrument panel is illuminated.
Warning Level 3
Warning Level 2 automatically advances to Warning Level 3 at the next ignition cycle. The driver will hear 4 chimes on entering Warning Level 3. The series of 4 chimes is repeated 3 times during each ignition cycle. The DIC displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•Speed Limited to 89 km/h (55 mph)
The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 89 km/h (55 mph), remains displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously.
Vehicle speed is limited to 89 km/h (55 mph).
Warning Level 4
Warning Level 4 is triggered when the distance driven since receiving the first DEF Quality Warning message exceeds approximately 1,609 km (1,000 mi). The driver will hear 4 chimes on entering Warning Level 4. The series of 4 chimes will repeat 3 times during each ignition cycle. The DIC displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•Speed Limited to 89 km/h (55 mph)
•6 km/h (4 mph) Max Speed Next Fuel Fill
The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 89 km/h (55 mph), and 6 km/h (4 mph) Max Speed Next Fuel Fill, remain alternately displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously.
Vehicle speed is limited to 89 km/h (55 mph).
Warning Level 5
Warning Level 5 is triggered when the distance traveled is greater than 1,609 km (1,000 mi) and the ECM detects a fuel fill event. The driver will hear 4 chimes on entering Warning Level 4. The series of 4 chimes will repeat every 3 minutes. The DIC displays the following messages:
•Exhaust Fluid Quality Poor
•See Owner's Manual Now
•Speed Limited to 6 km/h (4 mph)
The messages alternate every 5 seconds until acknowledged by the driver; however, the Speed Limited to 6 km/h (4 mph), remains displayed on the DIC. The DEF Indicator in the instrument panel flashes continuously.
Vehicle speed is limited to 6 km/h (4 mph) maximum.
Hey so I just bought a 2013 duramx with 175k on it , it threw a code for a nox sensor, i looked it up they a $bucks, my truck is completey stock, would it be worth it to get a delete kit for $1200 and just save my headaches with the def, ohhh it throws thermostat codes and a maf sensor which im going to clean and get a new airfilter
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
-
?
