P1137 2004 Nissan Sentra -what do the letters P D stand for after the code P1137? (P1137 P D)

Question

Nissan sentra 2004 what is the check engine light with,
code P1137 P D.

What do the letters P D stand for after the code P1137? (P1137 P D)

Answer 1

It stands for Pending, that means the problem has not replicated again yet.