P0670 - OBD II Trouble Code

Our automotive experts have put together the following information about the P0670 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 P0670 code.

What Does P0670 Code Mean?

OBD-II Code P0670 is defined as a Glow Plug Control Module Control Circuit/Open

The Glow Plug Module controls the Glow Plugs. Diesel engines use Glow Plugs to heat up the combustion chambers to enable a quicker cold start. When the engine control module (PCM) detects a problem with the Glow Plug Control Module, it will set code P0670.

P0670 Symptoms

• Engine may not start
• Hard engine start

Common Problems That Trigger the P0670 Code

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

Common Repairs Needed for the P0670 Code

• Glow Plug Replacement