1)
Check resistance between the following terminals of EGR valve (1) in each pair.
If found faulty, replace EGR valve assembly.
EGR valve resistance (A – B, C – B, F – E, D – E terminal)
20 – 24 Ω
3)
Inspect valve (2), valve seat (3) and rod for fault, cracks, bend or other damage.
If found faulty, replace EGR valve assembly.