P06F8
Glow Plug Control Module 2 Control Circuit High
Generic OBD-II
Common symptoms
What you'll notice
- Check the wiring and connections of the glow plug control module 2
- Inspect and replace any damaged or faulty glow plugs
- Test and replace the glow plug control module 2 if necessary
- Inspect and repair any issues with the engine's temperature sensor
- Ensure that the battery voltage is within the required range for the glow plug control module 2 to function properly
Common causes
Most likely first
- Faulty glow plug control module
- Short circuit or open circuit in the wiring or connectors related to the glow plug control module
- Malfunctioning glow plugs
- Issues with the vehicle's battery or charging system
- Faulty engine control unit (ECU) or PCM (Powertrain Control Module)
How to diagnose & fix
Work through it in order
- Engine misfires or runs unevenly
- Trouble starting the engine or extended cranking time
- Poor fuel efficiency and decreased engine power
- Check Engine light illuminated on the dashboard
- Increased emissions and failure to pass emissions testing
Read & clear P06F8 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.