Demo/legacy repair — real data lives at cases posted by signed-in technicians.
Volvo A40G haul truck — DEF quality warning, tank verified good
Volvo A40G · Volvo D16J
AI Summary
72% of matched cases resolved by replacing the NOx sensor upstream of SCR. Wiring harness rub-through near frame rail is a common secondary cause.
Symptoms
DEF quality warning recurring. Fresh DEF from sealed tote tested at 32.5%. Sensor readings erratic.