Hi, guys.

I`m new in this forum, hopefully some one will help me

I have problem " Service Car Soon" warning light in dashboard.
Diagnostic showed I got a glow plug error:
"Cylinder 1 Glow Plug Control Circuit and Cylinder 4 pressure sensor malfunction"
Is it possible to troubleshoot the problem (I mean - calibrate the sensor) without changing the glow plug?
Because diagnostic showed it is malfunction not faulty in cylinder 4.

Thanks, Gvido.