P0633: The immobilizer key is not programmed in the engine control unit
The immobilizer key is not programmed in the engine control unit. It needs to be learned with diagnostic equipment.
| Code | P0633 |
|---|---|
| System | Engine and transmission |
| Group | P06xx, Control unit and auxiliary outputs |
| Type | Generic: it means the same on every make |
How to read and clear P0633 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 P0633 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
- P062F This control unit has an internal EEPROM memory fault
- P0630 The vehicle identification number is not programmed in the engine control unit
- P0631 The vehicle identification number is not programmed in the gearbox control unit
- P0632 The odometer mileage has not been programmed in the engine control unit
- P0634 The internal temperature of the engine or gearbox control unit is above normal
- P0635 The power steering control has an electrical fault
- P0636 The power steering control gives a lower signal than normal
- P0637 The power steering control gives a higher signal than normal
- P0600 Serial communication link fault
- P0601 Internal control module memory checksum error
- P0602 Control module programming error
- P0603 Internal control module keep alive memory (KAM) error
What does code P0633 mean?
The immobilizer key is not programmed in the engine control unit. It needs to be learned with diagnostic equipment.
How do you clear P0633?
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, P0633 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.
