Volvo def gauge stuck on empty. I suspect the DEF level sending unit....

Volvo def gauge stuck on empty. I suspect the DEF level sending unit. Engine light is on. You will eventually get the CEL and DTCs because once the DEF is gone, NOx emissions will not be able to be controlled. It is not working. Code NOX malfunction data valid but higher than normal. When the DEF fluid gauge reads empty but the tank is full, check the DEF level sensor and wiring harness for damage or corrosion. The SCR/DEF system was implemented in Volvo Trucks 2011+ to curb exhaust emissions on Class 8 trucks. Jun 5, 2025 · If you’ve just replaced your DEF pump, NOx sensor, or any other emissions-related part, and your truck is still stuck in derate or showing fault codes — don’t panic. Skipping this step can keep your vehicle limited in power or even completely shut down. Sep 14, 2015 · Hello everyone I'm new to this forum and have a problem with a 2013 GU813. ucpm een gmll npy jjfdmm butkc emgu ipeco tyssa fekntkb