The code P0678 tells you that something in the glow plug circuit is faulty causing the glow plug on cylinder 8 to fail to heat up. The entire circuit must be checked to locate the fault.

What is a P0678 code?

If the engine control module (PCM) detects the glow plug for cylinder eight is not operating properly, the PCM will set code P0678. Driving with this trouble code is not recommended. A vehicle with this code should be taken in to a repair shop for diagnosis.

What is glow plug control module?

The glow plug control module determines the timing and electric current required by the glow plugs based on input from the Engine Control Unit; The heating element in the glow plug is electrified so it heats up and emits visible light (hence the name);

What is code P0676 mean?

OBD-II Code P0676 is defined as a Cylinder 6 Glow Plug Circuit/Open. The Glow Plug is used on diesel engines to preheat the cylinder before the engine is started. If the engine control module (PCM) detects the glow plug for cylinder six is not operating properly, the PCM will set code P0676.

What is code P0673 mean?

The P0673 code is a generic powertrain code related to issues with a computer output circuit. In this case, it means that an issues has been noted with the glow plug circuit in cylinder 3 of your engine. Codes related to the P0673 include: P0670: Glow Plug Module Control Circuit.

What is code P1000?

Here is what P1000 means, in simple terms

It simply means that the engine control computer (ECC) has not completed its emission systems testing. A vehicle’s engine computer must complete multiple self-tests known as Readiness Monitors. P1000 means readiness monitor testing has not been completed.

Where is the number 8 glow plug on Duramax?

The #8 glow plug is on the driver side of the truck and it is cantered towards the bulkhead (firewall). If you are familiar with these trucks, you will recall the engine is tucked neatly under the cowl.

How do I bypass glow plug controller?

Zitat von Youtube: So when you turn the key on it gets power then we're gonna ground it out using a switch in the cab. So I ran this through an existing hole in the firewall.

What are the symptoms of glow plug failure?

Six signs it’s time to replace your glow plugs

  • Hard starting. A hard starting engine is the most common indicator of damaged glow plugs. …
  • Engine misfiring. …
  • Rough idling. …
  • Decreased fuel efficiency. …
  • White smoke. …
  • Black smoke.

Do you have to program a glow plug module?

Most of the time it is a simple glow plug replacement which can be diagnosed fairly quickly with something as simple as a test light. If the glow plug control module ends up needing to be replaced on 2006+ LBZ and newer engines, the glow plug control module does require programming.

How do I fix code P0676?

What Repairs can Fix the P0676 Code?

  1. Repair or replace any damaged, corroded, or loose wiring, connectors, and harnesses.
  2. Replace any blown fuses and repair any shorts.
  3. Replace damaged or broken glow plug for cylinder 6.
  4. Replace the glow plug relay for cylinder 6.