[thstone]

P1571 Immobilizer - Open Circuit / No Signal

1. Try your spare key. If it works reliably, then its your key.
2. Check under your drivers seat. Is it wet? Did you ever get water in the car? The immobilizer box is under the drivers seat and if it gets wet you can have problems.
3. Check wiring harness to/from the immobilizer visually for problems. Make sure the connectors are fully seated. Sometimes something can get jammed under the seat and damage the wiring.