P01DB
Cylinder 9 Injection Timing Performance Over Retarded
Generic OBD-II
Common symptoms
What you'll notice
- Check and replace the fuel injectors for cylinder 9.
- Inspect and clean the fuel delivery system.
- Verify and adjust the ignition timing for cylinder 9.
- Test and replace the crankshaft position sensor.
- Check and repair any wiring or electrical issues related to cylinder 9.
Common causes
Most likely first
- Faulty fuel injector in cylinder 9
- Clogged or dirty fuel injector in cylinder 9
- Issues with the fuel injection system in cylinder 9
- Incorrect fuel pressure in cylinder 9
- Malfunctioning ignition system in cylinder 9
How to diagnose & fix
Work through it in order
- Reduced engine performance
- Misfires or rough idling
- Increase in fuel consumption
- Engine hesitation or stumbling
- Illuminated check engine light
Read & clear P01DB yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.