OBD-II code · Powertrain (generic)
P021F Cylinder 12 Injection Timing
Generic injection timing fault on cylinder 12.
Is it safe to drive with P021F?
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 Cyl12
Related codes
- P020ACylinder 1 Injection Timing
- P020BCylinder 2 Injection Timing
- P020CCylinder 3 Injection Timing
- P020DCylinder 4 Injection Timing
- P020ECylinder 5 Injection Timing
- P020FCylinder 6 Injection Timing
- P021ACylinder 7 Injection Timing
- P021BCylinder 8 Injection Timing
- P021CCylinder 9 Injection Timing
- P021DCylinder 10 Injection Timing
- P021ECylinder 11 Injection Timing
- P0220Throttle/Pedal Position Sensor/Switch "B" Circuit
- P0221Throttle/Pedal Position Sensor/Switch "B" Range/Performance
- P0222Throttle/Pedal Position Sensor/Switch "B" Circuit Low Input
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.