P21EECylinder 10 Injector B Circuit Low
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- How the car detects it
- P21EE is the low-circuit code for the B injector of cylinder 10, the last cylinder of a V10. In practice that points to a ten-cylinder engine with two injectors per cylinder, of which only Lamborghini's Huracán is documented: its V10 pairs a direct injector with a port injector at each cylinder and was presented as the first V10 to combine both. Lamborghini does not publish which set is B or whether it uses this code. With cylinders 1 to 5 on one bank and 6 to 10 on the other, cylinder 10 is on the second bank. A short to ground is the core fault; CARB lets a maker report a broken wire under the same code instead of a separate open code. Before replacing parts, read the open code P21D8 and the A injector low code P0288 as well. High fault: P21EF.
- What you may notice
- Check engine light on
- Rough running or misfire on cylinder 10 (P0310)
- Fuel trim deviation on the second bank
- Likely causes
- LikelyCylinder 10 B injector wire grounded
- PossibleDamaged or corroded injector connector on cylinder 10
- PossibleInjector with internal ground fault
- RareEngine control unit output defective
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €150 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.