Key Programming · Other Services
Car Key Programming & Immobilizer Repair
Lost keys, dead fobs and immobilizer no-starts are some of the most frustrating problems a vehicle can have. We cut and program replacement keys, repair key fobs and fix the immobilizer and security-module faults behind “key not detected” and no-start conditions.
- ★ Google reviews
- Component-level repair
- 30-day warranty
- Mail-in across Canada
At a glance
- Service
- Car Key Programming and Immobilizer
- Common symptoms
- Engine cranks but won't start, or doesn't crank at all, "Key not detected" or immobilizer warning on the dash, Remote lock/unlock stopped working
- Turnaround
- Usually next day
- Warranty
- 30-day warranty after repair
- How
- Mail-in from anywhere in Canada · free quote
Key & Immobilizer Services
- Lost or stolen keys – a replacement key cut and programmed from scratch
- Key fob not working – repairing dead fobs, broken buttons and weak signal
- Car won’t start (immobilizer) – resetting ECU security and pairing a new transponder chip
- Key not detected (push-start) – diagnosing keyless entry and proximity-sensor faults
- Broken or worn keys – cutting a new blade and transferring the transponder chip
- Battery replacement resync – re-syncing fobs that lost programming
- ECU & immobilizer coding for new keys – matching keys to the car’s security system
Symptoms We Fix
- Engine cranks but won’t start, or doesn’t crank at all
- “Key not detected” or immobilizer warning on the dash
- Remote lock/unlock stopped working
- Only one working key left — get a spare before it’s too late
Why Choose ECU Repair Doctor
- Module-level knowledge — we fix the CAS, EIS, BCM or ECU behind the key problem
- Often far less than dealer key replacement pricing
- Proof of ownership required for every key we program
Car Key Programming and Immobilizer: frequently asked questions
What are the symptoms of a failing Car Key Programming and Immobilizer?
Common signs include engine cranks but won't start, or doesn't crank at all; "key not detected" or immobilizer warning on the dash; remote lock/unlock stopped working; only one working key left — get a spare before it's too late. If you see these, have the module tested before paying for a dealer replacement.
How do I send my module in?
Get a free quote by phone, text or the contact form, then pack the module in an anti-static bag with padding and mail it to 76 Sherry Road, Unit H, Scarborough, ON M1L 2J9. Turnaround: usually next day.
Last updated October 2026
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Don’t replace it — repair it.
Most failed modules can be repaired for a fraction of the dealer replacement price, and come back cloned to your vehicle so there’s no extra programming visit.