P0670 — Glow Plug Control Module Control Circuit
| Meaning | The engine computer has detected an electrical fault in the control circuit for the glow plug module. This module is responsible for heating the glow plugs to help start the engine when it is cold. |
| Family | Powertrain (P) |
Typical symptoms
Engine cranking longer than usual before starting
White or grey smoke from the exhaust right after starting
Check engine light or glow plug symbol on the dashboard
Common causes
Corroded, loose, or damaged wiring harness to the control module
Failed glow plug control module
Internal fault within the engine control unit
What to do
Frequently asked questions
What does code P0670 mean?
Glow Plug Control Module Control Circuit. The engine computer has detected an electrical fault in the control circuit for the glow plug module. This module is responsible for heating the glow plugs to help start the engine when it is cold.
Can I keep driving with code P0670 active?
Yes, no known limitation
Common causes — P0670
Blown fuse or faulty relay for the glow plug system Corroded, loose, or damaged wiring harness to the control module Failed glow plug control module Internal fault within the engine control unit
How do you fix code P0670?
Have a technician check the fuses, power supply, and wiring connections at the glow plug module first. It is best to address this soon, particularly if you live in a colder climate, to avoid putting extra strain on the starter and battery.
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