P1636
Inductive Signature Chip Communication Error
Severity
🔴 HighCan you drive?
Do not drive — repair immediately
Approx. repair cost
$56–167 (est.)
Symptoms
- Engine won't start
- Check engine light is on
- The car goes into emergency mode
- Problems with the immobilizer system
Causes
- Signature chip failure
- Wiring harness damage
- Problems with the engine ECU
- Software glitches
- Immobilizer system malfunction
How to Fix
- Check the integrity of the wiring harness
- Diagnose signature chip
- Check ECU software
- Replace faulty components
- Repair only from an authorized dealer