P1679
Immobilizer Environment Identification Failed
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)
Symptoms
- Engine won't start
- Engine stalls after starting
- The immobilizer indicator is on
- Check Engine light comes on
- The car does not respond to the ignition key
Causes
- Immobilizer antenna malfunction
- Problems with the chip in the ignition key
- Open or short circuit in wiring
- Failure in the immobilizer control unit
- Immobilizer system power supply problems
How to Fix
- Check the condition of the ignition key
- Diagnose the immobilizer antenna
- Check wiring integrity
- Scan immobilizer control unit
- Repair only from an authorized dealer