P1629

Symptoms

• Engine won't start
• The engine stalls immediately after starting
• The immobilizer indicator is flashing
• The alarm does not go off when trying to start
• No spark or fuel supply

Causes

• Immobilizer malfunction
• Damaged key with chip
• Open circuit in the anti-theft system
• ECU software failure
• Problems with communication between modules

How to Fix

1. Check the condition of the ignition key and its chip
2. Diagnose the immobilizer circuit for opens and short circuits
3. Check the functionality of the immobilizer module
4. Reflash or retrain keys
5. Repair only from an authorized dealer

Related codes

Error P1629 by Vehicle Brand