How does the def quality warning system work?
“To meet federal and state requirements, the electronic onboard warning system is designed to automatically monitor DEF quality. If poor-quality fluid is detected, the system will alert the driver. If poor-quality fluid is not replaced within 200 miles, the vehicle speed will be limited to 55 mph at the next vehicle start.
How to reset DEF tank fluid level warning?
Part one of the two part calibration will be titled “ECM DEF tank fluid level warning latched reset programming per PIP4864”. Select “Replace and Reprogram” as the Programming Process. Select “Normal” as the Programming Type.
Is the DEF system on a Chevy Duramax safe?
The whole DEF system is flawed and you will only get a temporary bandaid repair at the dealership. The DURAMAX is UNRELIABLE. IN MY OPINION IT IS ALSO UNSAFE AT THE REDUCED SPEED OF 55 MPH THEN 4 MPH. IT MAY BE A GOVERNMENT MANDATE, BUT IT IS A CHEVY DESIGN.
Why does my diesel go into Def limp mode?
Apparently, these are common repairs for diesels with Selective Catalytic Reduction Systems (SCR’s) running DEF (basically all diesels built after 2010). This is because most DEF formulas leave harmful deposits that will eventually cause failures like ours (a bad—read old—batch of DEF can trigger a DEF limp mode as well).
“To meet federal and state requirements, the electronic onboard warning system is designed to automatically monitor DEF quality. If poor-quality fluid is detected, the system will alert the driver. If poor-quality fluid is not replaced within 200 miles, the vehicle speed will be limited to 55 mph at the next vehicle start.
The whole DEF system is flawed and you will only get a temporary bandaid repair at the dealership. The DURAMAX is UNRELIABLE. IN MY OPINION IT IS ALSO UNSAFE AT THE REDUCED SPEED OF 55 MPH THEN 4 MPH. IT MAY BE A GOVERNMENT MANDATE, BUT IT IS A CHEVY DESIGN.
Apparently, these are common repairs for diesels with Selective Catalytic Reduction Systems (SCR’s) running DEF (basically all diesels built after 2010). This is because most DEF formulas leave harmful deposits that will eventually cause failures like ours (a bad—read old—batch of DEF can trigger a DEF limp mode as well).
What happens when you fill the DEF tank?
Bottom line, the truck gave NO prior warnings, gave an incorrect warning, and failed to detect a refill for some time. The best part was explaining it all to my wife and she says if the truck can tell when you refill the wiper fluid right away, why does it take 30 minutes and 6 key cycles to know you filled the DEF tank?