P1621

Immobilisation ECU Interface - Message Timeout

P1621 - Immobilisation ECU interface fault.: Last occurrence - signal fault

Possible causes:
1. Short circuit C0331/21 (SN) - battery.
2. Short circuit C0331/21 (SN) - 5 V.
3. Short circuit C0331/21 (SN) - ground.
4. Immobilisation ECU.
5. V8 Engine Management System ECM.

1. Short circuit C0331/21 (SN) - battery.
SHORT_CIRCUIT
Check resistance < 5.0 Ohms.

2. Short circuit C0331/21 (SN) - 5 V.
SHORT_CIRCUIT
Check resistance < 5.0 Ohms.

3. Short circuit C0331/21 (SN) - ground.
SHORT_CIRCUIT
Check resistance < 5.0 Ohms.

4. Immobilisation ECU.
No detail available for this fault

5. V8 Engine Management System ECM.
No detail available for this fault