[Archived] Lotus 15 'Immobilizer Active' - won’t start after fuse pull

4230 views - Last reply: December 31, 2024
This topic is closed for new replies.

Need the key code to program a new key for my Lotus 15 - help?

Hello! We've developed a VIN-based tool to help you get your key code for the Lotus 15. Check it out here: VIN Key Code Generator.

Replies (4)

Great info! Needed this for my old Lotus 15.

I think my Lotus 15 has the same issue. Good to know I'm not alone.

Following closely—this could be the fix I need for my Lotus 15.

Just wanted to say this guide helped with my Lotus 15!

Check the news !

Drag Racing Championship
🚙 Local Meetup: Drag Racing Championship
The best local cars all in one place

🏁 Where: City Park Pavilion
📆 When: May 28 @ 11AM-7PM

Event features:
Show 'n Shine | Dyno Challenge | Parts Swap

⚙️ Forum Members: Forum members get preferred parking! ✨

🧰 Paint & Bodywork Techniques

👨‍🏫 Instructors:
• Detailer Extraordinaire Lisa Wong
• Custom Fabricator Mike 'Wrench' O'Connor

🔌 Hands-On Activities:
• Interior restoration techniques
• 6-hour intensive training
• Personal coaching

📅 Skills Covered:
Torque specs | Bleeding procedures | Pad selection

🚙 May 8, 2026 at 10:00 AM (6-hour)

✨ Free parts giveaway for all attendees!

Workshop: Paint & Bodywork Techniques
Drivetrain Optimization Workshop

🔋 Drivetrain Optimization Workshop

🧰 Instructor: Engine Builder Mike O'Connor (1000+ HP builds)

📱 Workshop Includes:
• Emission-legal power gains
• 4-hour intensive hands-on training
• Exhaust scavenging | Header design | Backpressure

📉 Bonus: 20% discount on performance parts

🔌 Next Session: May 12, 2026 at 3:00 PM

Customize Your Tuning Focus:

🚀 Performance Mod Cost Estimator

Pro Tip: Supporting mods (fuel system, cooling) are often needed for big power gains

Vehicle Information

Modification Information

Additional Options

🔑 Car Key & Fob FAQ

Common questions about key programming, fob issues, and replacement options

Lost Keys
Dealerships can often cut keys using your VIN, but will require proof of ownership. This only works for original factory keys - aftermarket or previously replaced locks won't match. The key will still need programming to start the car if it has a transponder.
Key Programming
Most transponder keys and smart keys can be reprogrammed if they haven't been damaged. Basic mechanical-only keys (no chip) can't be reprogrammed - they must be physically cut to match your locks.
Key Tip: Always have at least two working keys to avoid expensive replacements
Key Programming
Some vehicles allow DIY key programming using specific sequences (like turning ignition on/off with original keys). However, most modern cars require specialized equipment only locksmiths or dealers have. Check your owner's manual for your specific model.
Key Programming
Programming syncs the key's transponder chip with your car's immobilizer system. The process varies by manufacturer but generally involves: 1) authenticating with the car's computer 2) erasing old keys if needed 3) programming new key codes 4) testing functionality.
Lost Keys
Costs vary widely: Basic keys: $50-$150, Transponder keys: $150-$300, Smart keys/fobs: $200-$800, Dealership replacements typically cost 20-50% more than locksmiths. Emergency/lockout service adds $50-$150.
Key Fact: Modern transponder keys have been required in all new US vehicles since 1998

🔑 KEY SERVICES CLASSIFIEDS

Key Fob Repair & Battery Replacement
$25+
Posted: Apr 27, 2026
Fob not working? We fix broken buttons, replace batteries, and resync to your vehicle. Most repairs done while you wait. Water damage specialists available.
Call: 517-303-4963
Smart Key Programming Special
$150
Posted: Apr 27, 2026
Push-to-start key replacement for Toyota, Honda, Nissan, Ford. Includes programming and testing. Limited time offer - normally $200+. Call for availability.
Call: 634-752-2031
Anti-Theft System Repair
$85+
Posted: Apr 22, 2026
Fixing security light issues, PATS systems, and ignition immobilizers. Proper diagnosis before repair. Most vehicles serviced same day. Warranty on all work.
Call: 563-324-7144
Key Fob Case Replacement
$35
Posted: Apr 20, 2026
Cracked or damaged fob housing? We transfer your electronics to a new case. Multiple color options available. Most models in stock. 15-minute service.
Call: 907-893-7547
Ads refreshed daily • Licensed professionals • Mobile services available

🔑 Upcoming Key & Immobilizer Services

Seminar
May 22, 2026

Transponder Key Tech Day

by The Key Lab
Hands-on training for programming transponder keys, smart keys, and fobs using professional tools
Seminar
May 17, 2026

Lost Key Solution Roadshow

by Fob Fixers
In-depth class covering push-to-start systems and proximity key programming techniques
Workshop
May 9, 2026

VIN Decoding Workshop

by Car Key Solutions
Live demonstration of the latest anti-theft technologies and bypass prevention methods
Workshop
May 27, 2026

Lost Key Solution Roadshow

by Auto Key Masters
Hands-on experience with the newest transponder key cloning and programming equipment

Need immediate service? Call our 24/7 hotline: 1-800-KEY-HELP

Want to list your key service? Join our provider network

Last posts on the forum