P01D4
Cylinder 5 Injection Timing Performance Over Advanced
Generic OBD-II
Common symptoms
What you'll notice
- Check and clean fuel injectors for cylinder 5.
- Inspect and replace spark plugs for cylinder 5.
- Verify and adjust ignition timing for cylinder 5.
- Test and replace the fuel injector for cylinder 5 if necessary.
Common causes
Most likely first
- Faulty fuel injector in cylinder 5
- Ignition timing set too advanced in cylinder 5
- Faulty spark plug in cylinder 5
- Low fuel pressure in cylinder 5
- Engine control module (ECM) malfunction affecting cylinder 5
How to diagnose & fix
Work through it in order
- Engine misfires or runs rough
- Decreased fuel efficiency
- Rough idling or stalling
- Loss of power or acceleration
- Increased exhaust emissions
Read & clear P01D4 yourself
Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.