What is the P0680 fault number? What is the Cylinder 10 Glow Plug Circuit/Open Malfunction description? How do I fix the P0680 fault code What are the causes and symptoms of the P0680 fault codes?
What is the P0680 fault code? What does it signify?
What does the P0680 code mean? “Cylinder 10 Glow Plug Circuit/Open . This code is set when a malfunction occurs in the cylinder 10-glow plug circuit. The P0680 fault code is triggered if there is more that a 10% difference between the glow plug voltage for cylinder 10 (or the manufacturer’s set level).
When the engine is cold, compressed air temperature quickly loses its heat. A glow plug, which is a preheating element, is used to solve this problem. The glow plugs are usually mounted through the cylinder heads as close to the combustion chambers as possible.
The powertrain control module (PCM) controls glow plugs. It monitors coolant and oil temperatures, transmission temperature, and intake air temperature. The PCM activates the glow plug when it detects that the engine has become cold through sensors. If code P0680 is activated, the PCM will detect that the glow plug has not been heating up. This code usually indicates a fault in the electrical circuit.
When the engine is hot, however, glow plugs will not be required. To prevent damage to the engine and glow plugs, the PCM switches off the glow control system once the coolant temperature has reached a certain threshold.
What causes the P0680 Fault code?
These are the most common reasons that P0680 fault codes are triggered:
- – Defective glow plug, Cylinder 10
- – Defective timer or glow plug control module
- – Defective, corroded, or damaged wires, harnesses, and any associated connectors in the glow bulb circuit
- – Defective glowplug relay
- – Blown Fuses
What are the symptoms for P0680 fault code?
You may experience the following symptoms if your vehicle has the code P0680:
- – Illumination and control of the check engine light
- – Too long waiting to start the engine
- In cold weather, the engine might not start at all
- – A Preheat light that does not come on or remains on at all times
- – The vehicle’s exhaust emits white smoke when it is being started
- – You may experience a loss in power until your engine warms up.
- – Extremely loud engine noise
- Engine misfire
How do I fix the P0680 fault code?
Diagnose this code first if you find a P0670(Glow Plug Control Module Circuit Malfunction code) along with the code.
There are several repairs that can resolve the P0680 fault code.
- Repair or replacement of damaged, corrosion-prone fused wires, and loose connectors
- Repair or replacement bent or damaged pins for electrical connectors
- Repairing short or open circuit problems and replacing blown fuse
- – Replacing defective glow plug in cylinder 10.
- Relay for a defective glow plug
- Replacing a defective glow plug control module, or timer
- Clear all codes, test your vehicle and check the PCM again to make sure that there are no errors.
How Serious Is the P0680 Fault Code
The P0680 code is not likely to prevent a vehicle’s starting. Even if one spark plug is defective, the engine will continue to run. It is possible to make it more difficult to start the engine in colder conditions, but this can be due to time and temperature changes. This can result in a decrease of power and acceleration.
