Mitsubishi Key Programming 

How to Program a Mitsubishi Colt Key with LAUNCH X431 (Step-by-Step Guide)

• June 16, 2026
Learn to program a Mitsubishi Colt key (2004-2013) using a LAUNCH X431 scanner. Step-by-step guide with PIN code retrieval, troubleshooting, and remote fob programming.

Published: June 15, 2026

Quick Answer: Programming a Mitsubishi Colt Key with LAUNCH X431

You can program a new key or remote for a Mitsubishi Colt (2004‑2013 models) using a LAUNCH X431 scanner by accessing the Immobilizer or Key Programming function under the Mitsubishi menu. The process requires a 4‑digit PIN code (retrievable via the tool or from a dealer/locksmith), then selecting “Add Key” or “Program Key.” For transponder keys, you’ll need a compatible blank with a 4C chip. Remote fob programming is a separate step. Total time: about 10–15 minutes. Important: Keep all existing keys present or they will be erased from the system.

1. Understanding Your Mitsubishi Colt Key System

Key Types and Their Functions

  • Standard Transponder Key – A physical key with an embedded 4C chip that communicates with the immobilizer system.
  • Remote Key Head (Fob) – Combines a transponder key with remote locking/unlocking buttons.
  • Separate Remote Fob – Some Colt variants use a standalone remote for central locking, which requires its own programming procedure.

Which Mitsubishi Colt Models Are Compatible?

  • Colt Mk6 (2004–2008)
  • Colt Mk7 (2008–2013)
  • Ralliart and CZT variants (same immobilizer system)

Why You Need the LAUNCH X431

The LAUNCH X431 series (X431 V, X431 Pro, X431 PAD) offers professional-grade immobilizer and key programming functions that generic OBD2 scanners cannot perform. These tools can read PIN codes, add or erase keys, and program remote fobs through the OBD2 port.

2. What You’ll Need Before Starting

Required Tools and Materials

  • LAUNCH X431 diagnostic tool (with up‑to‑date Mitsubishi software)
  • Blank transponder key (pre‑cut to match your original key)
  • Original working key(s) – if you have any
  • The vehicle’s 4‑digit PIN code (see Section 3)
  • OBD2 cable (included with the X431)

Important Safety Precautions

  • Work in a safe, ventilated area. Engage the parking brake and turn the vehicle off.
  • Do not disconnect the X431 or turn the ignition off during the programming sequence.
  • Keep all keys away from the ignition unless the procedure specifically asks for them.

3. How to Obtain the Vehicle’s PIN Code

Method 1: Retrieve via LAUNCH X431

  1. Connect the X431 to the OBD2 port under the dashboard.
  2. Turn the ignition ON (engine off).
  3. On the tool, select “Diagnostics” → “Mitsubishi” → “Colt” → your model year.
  4. Navigate to “Immobilizer” → “Read PIN Code.”
  5. The tool should display the 4‑digit PIN. Write it down and keep it safe.

This works for most 2004+ Colt models. If the tool fails, move to Method 2.

Method 2: From Dealer or Locksmith

Contact a Mitsubishi dealer (provide your VIN) or a professional automotive locksmith. They can supply the PIN for a fee, typically between $20 and $50 USD.

Method 3: Physical Sources (Older Models)

Rarely, the PIN may be printed on a sticker inside the glove box, door jamb, or in the owner’s manual. Check these spots before spending money.

4. Step-by-Step Key Programming Procedure

Step 1: Connect the LAUNCH X431

  • Turn the ignition to the OFF position.
  • Plug the X431 into the OBD2 port (usually under the dashboard near the steering column).
  • Turn the ignition ON (engine off).
  • Wait for the tool to boot and establish communication with the vehicle.

Step 2: Navigate to the Immobilizer Menu

  • Tap “Diagnostics” on the X431 home screen.
  • Select “Mitsubishi” → “Colt” → your vehicle year.
  • Choose “Immobilizer” or “Key Programming” (sometimes listed under “Special Functions”).

Step 3: Enter the PIN Code

  • Select “Program Key” or “Add Key.”
  • When prompted, enter the 4‑digit PIN code.
  • If correct, the tool confirms authorization. If wrong, double‑check the code and try again (see troubleshooting below).

Step 4: Program the New Key

  • With existing keys: Insert an original working key into the ignition. Follow the on‑screen instructions to add the new key. The tool will tell you when the new key has been learned.
  • Without existing keys (all keys lost): Select “All Keys Lost.” The tool erases all stored keys. Then program each new key one by one, following the prompts.
  • After each key is successfully programmed, remove it from the ignition and insert the next key (if programming multiple).

Step 5: Test the New Key

  • Remove the X431 and turn the ignition off.
  • Insert the newly programmed key and start the engine.
  • Verify that the dash’s immobilizer light turns off after starting.

Step 6: Program the Remote (if applicable)

Remote fob programming is often a separate procedure. See Section 6 for details.

5. Troubleshooting Common Issues

Problem 1: “Communication Error” or “Connection Lost”

Solutions:

  • Check the OBD2 port for bent or corroded pins.
  • Confirm the ignition is in the ON position (engine off).
  • Update the X431 software via Wi‑Fi.
  • Try selecting “Global” Mitsubishi instead of a specific year.

Problem 2: PIN Code Not Accepted

Solutions:

  • Double‑check the code – a common mistake is swapping the digit 0 for the letter O.
  • Obtain a fresh code from the dealer or locksmith.
  • Some Colt models require a 6‑digit code – contact your dealer to verify.

Problem 3: Key Starts the Engine, but the Remote Doesn’t Work

Solutions:

  • Remote programming is a separate step – refer to Section 6.
  • Replace the remote battery (typically a CR2032 coin cell).
  • Ensure the fob operates on the correct frequency (433 MHz is standard, but 315 MHz is used in some markets).

Problem 4: Dash Immobilizer Light Stays On

Solutions:

  • The transponder chip may be damaged or incompatible – use a known good blank.
  • Repeat the programming procedure from the beginning.
  • Confirm you are using a 4C chip (common for Mitsubishi).

Problem 5: LAUNCH X431 Cannot Find the Vehicle

Solutions:

  • Update the X431 software via the “Software Update” menu.
  • Manually select “Mitsubishi” → “Colt” → year range.
  • Contact LAUNCH support with your VIN to verify coverage.

6. Programming the Remote Fob (Separate Procedure)

How to Enter Remote Programming Mode (Manual Method)

  1. Close all doors and fasten the driver’s seatbelt (some models require this).
  2. Turn the ignition ON → OFF quickly three times, ending with OFF.
  3. Press the LOCK button on the original remote for 1–2 seconds.
  4. Within 10 seconds, press LOCK on the new remote.
  5. If successful, the door locks will cycle (lock/unlock).

Using LAUNCH X431 for Remote Programming

  • In the “Immobilizer” menu, select “Remote Control Programming.”
  • Follow the on‑screen instructions. You may need to re‑enter the PIN code.
  • The tool will guide you through syncing each remote.

7. Important Considerations

10 Common Mistakes to Avoid

  1. Not having all existing keys present – they will be erased.
  2. Using a blank with the wrong transponder chip (must be 4C type).
  3. Entering the wrong PIN multiple times – some immobilizers lock out for hours after 3 failed attempts.
  4. Disconnecting the X431 mid‑procedure – this can corrupt the system.
  5. Forgetting to update the X431 firmware.
  6. Skipping the remote programming step.
  7. Buying an uncut blank – it must be cut to match your original key’s grooves.
  8. Ignoring vehicle battery health – low voltage can cause communication failures.
  9. Attempting the procedure on a modified or aftermarket ECU.
  10. Not saving the PIN code after retrieval – you’ll need it again later.

8. Frequently Asked Questions (FAQ)

Q1: Can I program a Mitsubishi Colt key without the original key?

Yes, you can use the “All Keys Lost” function on the LAUNCH X431. You will need the correct PIN code and at least one blank transponder key. All previous keys will be erased, so you’ll start fresh.

Q2: How much does it cost to program a key with LAUNCH X431?

If you already own the tool, it’s free after the initial investment ($200–$1,000+ for the X431). If you hire a locksmith, expect to pay between $50 and $150.

Q3: What type of transponder chip does a Mitsubishi Colt use?

Most Colt models from 2004 to 2013 use a 4C chip (part numbers such as T5, T6, or 4D‑60 – verify by VIN with your dealer).

Q4: Can I use a LAUNCH X431 to program a key for a Colt with a push‑to‑start system?

No. Push‑to‑start models (rare in Colts) require a different procedure and may need programming of the smart key module. The standard X431 immobilizer function cannot handle these systems.

Q5: How many keys can I program at once?

Up to 4 keys (including integrated remote fobs) for most Colt models. Plan ahead if you need extra copies.

Q6: Do I need to renew the subscription for the X431 to access key programming?

Yes, immobilizer and key programming functions typically require a valid “Pass‑Through” or “Commercial” subscription. Check your X431 plan before starting.

Q7: Will the LAUNCH X431 work for a 1990s Mitsubishi Colt?

No. Pre‑2004 Colts may not be supported via OBD2 for key programming. You would need an older diagnostic tool or a specialist locksmith.

Q8: What if the X431 says “Operation Not Supported”?

Your tool may need a software update, or your Colt model may not be covered. Contact LAUNCH support with your VIN for confirmation.

Q9: Can I program the key using a smartphone app instead?

Only if you own an X431 that supports remote control (e.g., X431 V+). Standalone smartphone apps cannot perform immobilizer programming – they lack the required hardware and security protocols.

Q10: Is it possible to lock myself out of the car during programming?

Yes. If programming fails, the immobilizer may prevent the engine from starting. Always have a backup working key nearby or arrange for a locksmith before starting.

Final Checklist for Success

  • Update LAUNCH X431 to the latest Mitsubishi software.
  • Obtain the correct 4‑digit PIN code (via tool or dealer).
  • Purchase a blank key with the correct 4C chip.
  • Have all existing keys nearby (if any).
  • Read each on‑screen prompt carefully and wait for confirmation before moving to the next step.

About the Author: Erwin Salarda is an Automotive Service Equipment Technician based in the Philippines, specializing in computerized automotive diagnostic equipment such as OBD scanners and wheel alignment systems. Since 2012, he has been actively providing technical support, equipment installation, troubleshooting, after-sales service, and hands-on training for automotive service equipment used by workshops and automotive professionals.

He has received specialized training from international suppliers and manufacturers, including Launch X431 in Shenzhen, China, Lawrence Engineering Company in Guangzhou, China, and 3Excel Wheel Alignment Company in Shenzhen, China. Through these trainings, he developed advanced expertise in automotive diagnostics, calibration, wheel alignment systems, and computerized automotive service technologies.

Erwin Salarda provides professional after-sales support and technical training for automotive diagnostic and wheel alignment equipment, helping clients maximize the performance and proper use of their tools and systems. His experience covers equipment setup, software updates, calibration procedures, troubleshooting, and operational guidance for automotive workshops and service centers.

With more than a decade of experience in the automotive equipment industry, Erwin Salarda continues to support automotive businesses by delivering reliable technical expertise and practical training solutions.

For inquiries and equipment purchases, please visit https://carlifterph.com/

Related Posts