P0679

DTC P0679, sometimes indicated as P067900 is an OBD diagnostic trouble code indicating a generic fault with the vehicle powertrain (i.e. engine and gearbox). This code identifies an error with the transmission (gearbox) causing cylinder 9 glow plug circuit.

Possible causes of this fault code include a defective glow plug, a wiring issue, a problem with the glow plug controller, or a problem with the engine control unit.
If the glow plug is defective, it will need to be replaced. If the wiring is at fault, the wiring will need to be repaired. If the glow plug controller is defective, it will need to be replaced. If the engine control unit is defective, it will need to be replaced.

• P0679: Cylinder 9 Glow Plug Circuit
• P0679: Cylinder 9 Glow Plug Circuit/Open
• P0679: Glow Plug/Heater Cylinder 9
• P0679: Glow plug, cylinder 9 – circuit malfunction
• P0679 00: Glow plug, cylinder 9 - circuit malfunction