P03CF
Cylinder 6 Pressure Variation High
Generic OBD-II
Common symptoms
What you'll notice
- Check and replace spark plugs in cylinder 6
- Inspect and clean fuel injectors in cylinder 6
- Check and replace ignition coil in cylinder 6
- Perform a compression test on cylinder 6 and repair any issues found
Common causes
Most likely first
- Faulty spark plug in cylinder 6
- Ignition coil failure in cylinder 6
- Clogged fuel injector in cylinder 6
- Vacuum leak in the intake manifold near cylinder 6
- Low compression in cylinder 6 due to worn piston rings or damaged valves
How to diagnose & fix
Work through it in order
- Loss of power or acceleration
- Rough or uneven idle
- Engine misfire
- Increase in fuel consumption
- Check engine light illuminated
Read & clear P03CF yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.