P0683 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0683 diagnostic trouble code. We've provided the common symptoms that occur when this code is set along with the frequent repairs that address the issues related to the P0683 code.

What Does P0683 Code Mean?

OBD-II Code P0683 is defined as a Glow Plug Control Module to PCM Communication Circuit

The Glow Plug Module controls the glow plugs used on diesel engines to preheat the cylinder before the engine is started. If the engine control module (PCM) cannot communicate with the Glow Plug Module, the PCM will set code P0683.

P0683 Symptoms

• Engine may not start
• Hard or no start in cold weather

Common Problems That Trigger the P0683 Code

• Glow plug control module failure
• Powertrain Control Module (PCM) failure
• Wiring issue