Key Code Install | Jcb

| Symptom | Likely Cause | Action | |--------|--------------|--------| | Immobilizer light stays on | Wrong transponder type | Use JCB-approved key blank | | Light flashes rapidly | Timeout exceeded | Repeat procedure faster (within 10 sec steps) | | No response after step 5 | Key already programmed or faulty | Test key on another machine or replace blank | | "Access Denied" in software | Incorrect PIN / dealer lock | Contact JCB dealer for override |

Ensure the battery is fully charged. Low voltage can cause a handshake failure between the key and the ECU. jcb key code install