Step-by-step guide to program a new Dacia Logan key using a LAUNCH X431 scanner. Covers PIN code retrieval, immobilizer functions, troubleshooting, and cost comparison vs dealership.

How to Program a New Key for the Dacia Logan Using a LAUNCH X431 Scanner

Published / Last Updated: June 15, 2026

Quick Answer: Can You Program a Dacia Logan Key with a LAUNCH X431?

Yes, you can program a new key for a Dacia Logan using a LAUNCH X431 scanner — but only if you have the correct immobilizer software (usually LAUNCH X431 IMMO) and at least one original master key. The process involves reading the immobilizer system, retrieving the PIN code (or using an online login), adding the new key through the scanner’s special functions, and verifying the key starts the engine. If you have lost all existing keys, you’ll need the All Keys Lost function, which typically requires a paid token.

Understanding the System: Dacia Logan Immobilizer Basics

Why Does This Matter?

Modern Dacia Logans — including the Logan 2 and Logan 3 — use a transponder chip embedded in the key fob. When you insert the key and turn the ignition, the engine control unit (ECU) sends a challenge signal to the chip. If the chip responds with the correct code, the immobilizer disengages and the engine starts. Without that handshake, the car cranks but never fires.

A standard OBD2 code reader cannot access this security system. You need a bi-directional diagnostic tool like the LAUNCH X431 that can communicate with the immobilizer control unit directly.

Key Types and Compatibility

Dacia Logans typically use either ID46 or ID48 transponder chips, depending on the model year and market. For example:

Model Year	Common Transponder Type
2004–2012 (Logan 1)	ID46
2012–2020 (Logan 2)	ID48
2020+ (Logan 3)	ID48 (some variants use ID46)

Always verify the chip type before buying a blank key. You can do this by reading the original key with the X431’s “Read Key Info” function.

Prerequisites Before You Start

Before you sit in the driver’s seat with the scanner, check these off:

Hardware: LAUNCH X431 scanner (X431 V+, PRO, PAD VII, or X431 EURO LINK all work). Older X431 models may require additional adapters.
Software: LAUNCH X431 IMMO must be installed and activated. This often requires a subscription or credits — don’t assume it’s included in your basic diagnostics package.
Blank key: A new, uncut, Dacia-compatible key with the correct transponder chip. You’ll also need to have the key blade cut to match your vehicle’s lock.
Working key: At least one original key that starts the car. If you have zero working keys, skip to the FAQ on “All Keys Lost.”
Battery: The Dacia Logan battery should read 12.5V or higher. Low voltage can interrupt the programming signal and cause failures.

Step-by-Step: Programming the New Key

Step 1: Vehicle Connection

Turn the ignition OFF and remove any keys from the ignition barrel.
Locate the OBD2 port under the dashboard on the driver’s side. Plug in the LAUNCH X431 diagnostic cable.
Turn the ignition ON (engine off). All dashboard warning lights should come on, including the immobilizer warning light (a car with a key symbol).
Power on the X431 tablet. Select Diagnostics from the home screen, then choose AutoScan — this will detect your Dacia Logan automatically. Alternatively, select Dacia > Logan manually.

Step 2: Enter the Immobilizer Function

From the vehicle selection screen, go to System Selection.
Choose Immobilizer — sometimes listed as Anti-Theft or IMMO.
The scanner will now attempt to communicate with the immobilizer ECU. Wait for it to read the ECU part number (common suppliers include Siemens, Delphi, or Continental). Write this number down; it helps if you need to contact support.

Step 3: Read the PIN Code

This is the most critical step. Most Dacia Logans require a 4-digit PIN code to authorize key programming.

Navigate to Special Functions > IMMO > Read PIN Code.
If the scanner retrieves the PIN automatically, write it down immediately and store it somewhere safe.
If the scanner instead asks for a “Login” or “Token,” you’ll need to purchase a one-time PIN retrieval via the X431 server. This requires an active internet connection on the tablet. Follow the on-screen prompts to purchase a token — costs vary by region, typically $3–$15.

Pro tip: Even if you only need one new key today, record the PIN for future use. You won’t want to pay for another retrieval later.

Step 4: Key Programming (Add Key)

From the IMMO menu, select Key Programming > Add Key.
The tool will ask: “How many keys do you want to program?” Enter the total number of keys you want working after this session. For example, if you have one original key and one new blank key, enter 2.
The scanner will now guide you through a timed sequence:
- Insert the first (original) key into the ignition, turn to ON position, wait 3–5 seconds, then turn OFF.
- Remove the first key and immediately insert the new key. Turn to ON, wait 3–5 seconds, then turn OFF.
- Wait until the scanner displays “Programming Successful.”
If you have more than two keys, the scanner will prompt you to repeat the process with each additional key in a specific order.

Step 5: Final Test

Remove the new key from the ignition.
Insert the new key and turn to ON. Watch the immobilizer warning light — it should turn off after about 2 seconds. If it stays on or flashes, the programming failed.
Try starting the engine. It should crank and run smoothly.
Test the original key again to confirm it still works. If the original key suddenly doesn’t work, you may have accidentally erased it — see troubleshooting below.

Troubleshooting: Common Issues & Solutions

Issue 1: Scanner Says “No Communication with ECU”

Likely cause: Wrong protocol selected or ignition not fully on.
Fix: Ensure the ignition is in the ON position with dash lights lit. Try using the X431’s Auto Detect function before manually selecting the immobilizer system. If the issue persists, check your OBD2 cable connection.

Issue 2: “Incorrect PIN Code” Error

Likely cause: The PIN stored in the scanner is outdated, or the vehicle requires a dealer-level login instead of a static PIN.
Fix: Switch to LAUNCH Online IMMO (requires internet connection and valid credits). The X431 will query the manufacturer’s server to fetch the correct PIN or login code.

Issue 3: New Key Programmed but Engine Won’t Start

Likely cause: The transponder chip in your blank key is faulty, or you bought the wrong type (e.g., ID46 key for an ID48 vehicle).
Fix: Use the X431’s Read Key Info function to check the chip ID of the new key. Compare it to the original. Replace the blank with the correct chip type and try again.

Issue 4: “All Keys Lost” – No Master Keys Available

Likely cause: You’ve lost all original keys, or the original key battery died and the chip is no longer readable.
Fix: Use the X431 IMMO > All Keys Lost function. This will erase all stored key codes from the ECU and let you program new keys from scratch. However, this usually requires a paid token and a secure internet connection. Proceed with caution — if the process fails midway, you may end up with a non-starting car that needs dealer intervention.

Pro Tips for Success

Must know: Write down your PIN code. I keep mine taped inside the owner’s manual. You’ll need it again if you ever add another key or replace the ECU.
Battery voltage: If your Dacia’s battery is weak, attach a trickle charger. A voltage drop during programming can corrupt the immobilizer data.
Time limit awareness: Dacia immobilizer ECUs enforce a 3-minute timeout between programming attempts. If you fail, wait at least 3 full minutes before trying again.
Software updates: Always update your LAUNCH X431 tablet’s firmware and IMMO software before beginning. Outdated software may not support newer Logan models (especially 2020+ Logan 3).
Remote locking vs. immobilizer: The key’s remote lock/unlock function (RF) is a separate system. If the new key starts the car but the remote buttons don’t work, you need to program the remote separately through the Body Control Module (BCM) > Special Functions > Remote Key Programming.

Frequently Asked Questions (FAQ)

Can I program a Dacia Logan key without any original key?

Yes, but it is more complex. You need to use the All Keys Lost function in the LAUNCH X431 IMMO software. You will need a valid online login (often a one-time token) to retrieve the PIN from the manufacturer. After that, you can program up to 2 new keys.

Can I use a standard OBD2 scanner instead?

No. A standard generic OBD2 scanner cannot access the immobilizer control unit. You need a professional-grade bi-directional tool like the LAUNCH X431.

Why does my new key start the car but the remote lock doesn’t work?

The transponder chip controls the engine start (immobilizer). The remote locking (RF remote) is a separate system. You need to program the remote separately. Navigate to Body Control Module (BCM) > Special Functions > Remote Key Programming on your X431.

How much does this typically cost at a dealership vs. DIY?

Dealership: $100–$200 (parts + labor + PIN retrieval).
DIY with LAUNCH X431: $3–$15 for the software token (if you already own the scanner), plus the cost of a blank key ($10–$30).

Will this work on a Lada Largus (which shares the same chassis)?

Yes. The Lada Largus and Dacia Logan share the same B0 platform and immobilizer system. The procedure is identical.

About the Author

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/

How to Program a Dacia Logan Key with LAUNCH X431 Scanner (2026)