Immobilizer / anti-theft won't let it start in Flint, MI
A flashing security or key light and an engine that cranks but won't start (or won't crank at all) means the immobilizer doesn't recognize the key. Often a simple reset works; sometimes the key chip or reader has failed and the car must go to a dealer.
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Try to reset the anti-theft system
Immobilizer glitches often clear with a simple key or power reset before you need a dealer.
⚠️ Safety first
Don't repeatedly crank the engine — you can drain the battery and flood the engine. If resets fail, request a tow.
- 1Use your spare key if you have one — a worn or damaged key chip is a common cause.
- 2Turn the key to ON (don't crank) and leave it for 10–15 minutes until the security light stops flashing, then try to start.
- 3For push-start, hold the fob against the start button in case the fob battery is weak.
- 4Make sure nothing is interfering with the fob — other keys, a second fob, or metal keychains.
- 5If it starts, drive to a dealer to have the key/immobilizer checked before it strands you again.
Get a tow to a dealer
If resets don't work, the key chip, antenna ring or immobilizer module likely needs dealer-level tools to re-sync — so the car needs to go to them.
- 1Confirm the car is parked safely and locked.
- 2Gather your photo ID and the vehicle registration — the dealer needs them to key the car.
- 3Bring any spare keys you have.
- 4Request a tow and set the destination to a dealer for your make.
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TowGo · Roadside help in Flint, Michigan