Measure the resistance between EGR valve terminals.
NOTE:
Make sure there is no foreign material between EGR valve and valve seat.
Terminals
No. 1 — No. 2:
No. 3 — No. 2:
No. 4 — No. 5:
No. 6 — No. 5:
Is the resistance between 20 — 30 Ω?
Replace the EGR valve.