OBD-II code · Powertrain (generic)
P01D1 Cylinder 4 Injection Timing Performance - Over Retarded
Injection timing on cylinder 4 lags more than allowed.
Is it safe to drive with P01D1?
Usually safe for short trips, but don’t ignore it: the underlying fault can get more expensive over time.
Common causes
- Most likelyInjector response drifted
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Injector Cyl4
Related codes
- P01CBCylinder 1 Injection Timing Performance - Over Retarded
- P01CDCylinder 2 Injection Timing Performance - Over Retarded
- P01CFCylinder 3 Injection Timing Performance - Over Retarded
- P01D3Cylinder 5 Injection Timing Performance - Over Retarded
- P01D5Cylinder 6 Injection Timing Performance - Over Retarded
- P01D7Cylinder 7 Injection Timing Performance - Over Retarded
- P01D9Cylinder 8 Injection Timing Performance - Over Retarded
- P01DBCylinder 9 Injection Timing Performance - Over Retarded
- P01DDCylinder 10 Injection Timing Performance - Over Retarded
- P01DFCylinder 11 Injection Timing Performance - Over Retarded
- P01E1Cylinder 12 Injection Timing Performance - Over Retarded
- P01CECylinder 2 Injection Timing Performance - Over Advanced
- P01D0Cylinder 3 Injection Timing Performance - Over Advanced
- P01D2Cylinder 4 Injection Timing Performance - Over Advanced
- P01D4Cylinder 5 Injection Timing Performance - Over Advanced
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.