P1623 — Immobilizer Code Word/ID Number Write Failure
Severity: Warning
Can you drive? With caution: limp mode possible, have it checked soon
Make: All makes (OBD-II standard)
| Meaning | Immobilizer Code Word/ID Number Write Failure. |
| Family | Powertrain (P) |
Frequently asked questions
What does code P1623 mean?
Immobilizer Code Word/ID Number Write Failure. Immobilizer Code Word/ID Number Write Failure.
Can I keep driving with code P1623 active?
With caution: limp mode possible, have it checked soon
How do you fix code P1623?
Diagnosis starts from reading the live ECU parameters: the code points to the fault area, not to the part to replace. A vehicle-electronics specialist can test the component and clear the code after the repair.
Need help with this fault?
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Where to get it fixed
Related codes
- P1600 — Loss of KAM Power; Open Circuit
- P1601 — ECM/TCM Serial Communication Error
- P1602 — Immobilizer/ECM Communication Error
- P1603 — EEPROM Malfunction
- P1604 — Code Word Unregestered
- P1605 — Keep Alive Memory Test Failure
- P1606 — ECM Control Relay O/P Circuit Malfunction
- P1607 — MIL O/P Circuit Malfunction
- P1608 — Internal ECM Malfunction
- P1609 — Diagnostic Lamp Driver Fault
- P1610 — SBDS Interactive Codes
- P1611 — SBDS Interactive Codes