P21D8: The cylinder 10 injector B has a broken or disconnected wire
The cylinder 10 injector B has a broken or disconnected wire. It is usually a broken wire, a loose connector or the part itself.
| Code | P21D8 |
|---|---|
| System | Engine and transmission |
| Group | P21xx, Throttle, injection and emissions |
| Type | Generic: it means the same on every make |
How to read and clear P21D8 with Final OBD
Plug an OBD2 scanner in under the steering wheel, switch the ignition on and open Final OBD. Under Faults you’ll see P21D8 with its description and whether it’s confirmed, pending or permanent.
If the engine stores it over standard OBD, with FREE you read this code with its explanation for nothing and clear it. With PRO you also read the faults of every control unit and clear them in all of them.
Clearing the code only turns the light off: if the cause is still there, it comes back. Clear it once it’s fixed, and not right before an inspection. It’s all in how to read and clear fault codes and in inspections and OBD.
Similar codes
- P21D4 The cylinder 6 injector B has a broken or disconnected wire
- P21D5 The cylinder 7 injector B has a broken or disconnected wire
- P21D6 The cylinder 8 injector B has a broken or disconnected wire
- P21D7 The cylinder 9 injector B has a broken or disconnected wire
- P21D9 The cylinder 11 injector B has a broken or disconnected wire
- P21DA The cylinder 12 injector B has a broken or disconnected wire
- P21DB The cylinder 1 injector B gives a lower signal than normal
- P21DC The cylinder 1 injector B gives a higher signal than normal
- P2100 Throttle actuator A control motor circuit open
- P2101 Throttle actuator A control motor circuit range or performance
- P2102 Throttle actuator A control motor circuit low
- P2104 Throttle control system: forced idle
What does code P21D8 mean?
The cylinder 10 injector B has a broken or disconnected wire. It is usually a broken wire, a loose connector or the part itself.
How do you clear P21D8?
With an OBD2 scanner and an app like Final OBD, which clears it for free if it’s stored by the engine control unit. But clearing it only turns the light off: if the cause isn’t fixed, P21D8 comes back.
Read it on your car
Final OBD reads and clears engine faults through standard OBD for free, each one explained in plain English. With PRO it also reads the faults of every control unit, each make’s own codes included, and clears them in all of them.
