P03D0
Cylinder 6 Combustion Performance
Generic OBD-II
Common symptoms
What you'll notice
- Check and replace faulty ignition coil or spark plug in cylinder 6
- Inspect and clean fuel injectors in cylinder 6
- Check and replace faulty oxygen sensor in cylinder 6
- Perform a compression test on cylinder 6 and repair any issues with low compression
- Verify proper fuel pressure in cylinder 6 and replace fuel pump if necessary
Common causes
Most likely first
- Ignition system malfunction in cylinder 6
- Fuel injector issue in cylinder 6
- Low compression in cylinder 6
- Vacuum leak in cylinder 6
- Faulty oxygen sensor in cylinder 6
How to diagnose & fix
Work through it in order
- Engine misfires or runs rough
- Loss of power or acceleration
- Rough idle or stalling
- Decreased fuel efficiency
- Check engine light illuminates
Read & clear P03D0 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.