DTC Code P0020

I was just scanning to see if there was any codes this morning and I came upon this:

Address 01: Engine Labels: 077-907-560-AXQ.lbl
Part No SW: 4D0 907 560 DA HW: 8E0 907 560
Component: 4.2L V8/5V G 0020
Coding: 0007875
Shop #: WSC 31414 000 00000
VCID: 68DF0D835868FA9

1 Fault Found:
17944 - Camshaft Timing Adj. Bank2 ( N208 )
P1536 - 004 - Open Circuit - Intermittent
Readiness: 0000 0000

There is no CEL on in the dash so is this something I should be concerned with? I cleared the code and it hasn't come back yet, so I guess time will tell..