P01DC
Cylinder 9 Injection Timing Performance Over Advanced
Generic OBD-II
Common symptoms
What you'll notice
- Check and adjust the fuel injection timing on cylinder 9
- Inspect and clean the fuel injectors on cylinder 9
- Replace the fuel injector on cylinder 9 if necessary
- Verify proper operation of the engine's timing components, specifically related to cylinder 9
Common causes
Most likely first
- Faulty fuel injector in cylinder 9
- Incorrect fuel pressure in cylinder 9
- Faulty ignition coil in cylinder 9
- Clogged or dirty fuel injector in cylinder 9
- Engine control module (ECM) issue affecting cylinder 9
How to diagnose & fix
Work through it in order
- Engine misfire or rough idle
- Decreased fuel efficiency
- Loss of power or acceleration
- Increased exhaust emissions
- Illumination of the check engine light
Read & clear P01DC yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.