How does the glow plug controller work on a Duramax?
The glow plug controller has the ability to perform internal checks, an open or a short to ground on each of the glow plug circuits. If the glow plug controller senses a problem in a glow plug circuit, the glow plug on the affected cylinder will be disabled and the glow plug controller will send an error message to the engine control module (ECM).
What is the DTC for cylinder 2 glow plug circuit?
P0672 is a diagnostic trouble code (DTC) for “Cylinder 2 Glow Plug Circuit”. This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $0.00.
Why is my cylinder 2 glow plug not working?
You may see this code for several reasons: There is a fault in the #2 cylinder glow plug. There are damages in the wiring connector. There is an open or shorted circuit in the glow plug. The control module for the glow plugs is faulty.
Where is the p0676 glow plug 6 control circuit?
So the check engine light came on and the P0676 code pulls on the CTS2. Truck is bone stock. I pulled and tested #6 glow plug (third back from the front on the drivers side) and it checked good. Cleaned the glow plug, connecting terminal, and nut. Put it back together and it popped the code again. Wondering what the next step to do is.
The glow plug controller has the ability to perform internal checks, an open or a short to ground on each of the glow plug circuits. If the glow plug controller senses a problem in a glow plug circuit, the glow plug on the affected cylinder will be disabled and the glow plug controller will send an error message to the engine control module (ECM).
So the check engine light came on and the P0676 code pulls on the CTS2. Truck is bone stock. I pulled and tested #6 glow plug (third back from the front on the drivers side) and it checked good. Cleaned the glow plug, connecting terminal, and nut. Put it back together and it popped the code again. Wondering what the next step to do is.
Can a glow plug be set to ground?
Keep in mind that the glow plug is only part of the circuit and the ENTIRE CIRCUIT must be electrically good. PO676 can set for short to ground or voltage, open or high resistance. If your plug tested to 6 ohms or less, the problem is likely with the circuit, not the plug.
What kind of DTCs do glow plugs use?
DTCs P0671-P0678 run continuously. The glow plug controller detects that the glow plug control circuit is open, shorted to ground, or has more than 1 ohm of resistance. DTCs P0671-P0678 are Type B DTCs.
What happens when the glow plug is disabled?
If the glow plug controller senses a problem in a glow plug circuit, the glow plug on the affected cylinder will be disabled and the glow plug controller will send an error message to the engine control module (ECM). If this condition exists, the DTC will set.
Keep in mind that the glow plug is only part of the circuit and the ENTIRE CIRCUIT must be electrically good. PO676 can set for short to ground or voltage, open or high resistance. If your plug tested to 6 ohms or less, the problem is likely with the circuit, not the plug.
How much does it cost to replace a glow plug on a GMC Sierra?
The average cost for a GMC Sierra 2500 HD glow plug replacement is between $234 and $339. Labor costs are estimated between $126 and $159 while parts are priced between $107 and $180. This range does not include taxes and fees, and does not factor in your specific model year or unique location. Related repairs may also be needed.
How does a glow plug work on a car?
Glow plugs heat up when the ignition switch it turned to the run position and the engine is cold. The glow plugs receive electricity, and turn that electricity into thermal energy. You can think of glow plugs like BBQ coals.
What happens if you don’t have a glow plug?
The ignition of the fuel and air creates more heat until, eventually, the engine is hot enough to run without a glow plug assist. What are the symptoms related to a bad glow plug? When glow plugs become weak, the engine will take longer than 3-5 seconds to start, and may not start at all after they degrade.