2011 Santa Fe 2.2 Crdi glow plug relay?
The issue started when there was +4 celsius outside.
It seems like car glow plugs doesnt work at all. It starts rough. And now when theres like -8 celsius then car barely starts.
i got error code P0684 "Glow Plug Control Module to PCM Communication Circuit Range/Performance". I checked the voltage on relay, which was 12,..Volts but after relay to the glow plugs there was only 3,2V and it didnt change even when i started the engine. Could it be the relay or something else?