P1677
Immobilizer Function Deactivated
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$17–111 (est.)
Symptoms
- Engine won't start
- The immobilizer indicator is on
- The car goes into emergency mode
- Lost connection with the key
Causes
- Malfunction of the key or its chip
- Problems with the immobilizer antenna
- Broken or shorted wiring
- Failure in the immobilizer control unit
- Incorrect system programming
How to Fix
- Check the condition of the key and its chip
- Diagnose the immobilizer antenna
- Check wiring integrity
- Read errors in the control unit
- Reprogram the immobilizer system
- Repair only from an authorized dealer