Mechanic Wiki: Geely Monjaro Key Programming with LAUNCH X431

Learn how to program a Geely Monjaro (Xingyue L) smart key using LAUNCH X431. Complete guide for key addition, security code retrieval, and troubleshooting.

Published: May 30, 2026

Quick Answer: Key Programming for Geely Monjaro with LAUNCH X431

To program a new smart key to a Geely Monjaro (Xingyue L) using the LAUNCH X431, you perform a Key Addition procedure. This process adds a new key to the vehicle’s system without erasing existing ones. The core steps involve: connecting the X431, selecting the correct vehicle model and system (PEPS or BCM), following the on-screen "Key Add" menu, entering the security access code (retrieved from the tool or a database), placing the new key in the designated programming spot (typically the center console cup holder), and confirming the key is synced. The entire process usually takes about 5–10 minutes per key.

Important: You must have at least one already programmed master key present in the vehicle to start the addition process. Without it, you would need to perform a full "All Keys Lost" procedure, which is more complex and may require special authorization.

Programming a smart key for a modern Geely Monjaro (also sold as the Xingyue L) might sound intimidating, but with the right diagnostic tool and a clear process, it’s a straightforward task. The LAUNCH X431 series is one of the most capable aftermarket tools for this job, giving you dealer-level functionality at a fraction of the cost. Whether you’re a DIY owner who lost a spare or a workshop technician adding keys for a customer, this guide covers everything you need to know for a successful key addition.

Complete Step-by-Step Programming Guide

This section provides a detailed walkthrough for a successful Key Addition on a Geely Monjaro (Xingyue L) using a LAUNCH X431 diagnostic tool.

Prerequisites and Setup

Before you begin, ensure you have the following:

LAUNCH X431 Diagnostic Tool: Any current X431 model (e.g., X431 PAD VII, X431 PRO, X431 V+) with the latest software version installed. A stable internet connection is required to download vehicle-specific software and retrieve security codes.
Valid Software Subscription: An active subscription for Geely / Chinese vehicle diagnostics.
Raw Smart Key: A new, uncut Geely Monjaro smart key fob. It must be compatible with the vehicle’s frequency (typically 433MHz or 315MHz).
Working Master Key: At least one original, previously programmed smart key for the vehicle.
Vehicle VIN: The 17-character Vehicle Identification Number (VIN) is often needed for code retrieval.

Step 1: Connect the LAUNCH X431 to the Vehicle

Turn the vehicle’s ignition OFF.
Locate the OBD-II diagnostic port (usually under the dashboard, driver’s side).
Connect the X431 diagnostic cable to the OBD-II port.
Turn the ignition ON (engine off). The vehicle’s dashboard and electronics should be active.

Step 2: Select Vehicle and System

Power on the LAUNCH X431 tablet.
Select Diagnostics from the home screen.
Choose Geely from the brand list.
Select Auto VIN Scan or manually enter the vehicle's VIN. The tool will identify the exact model (Monjaro / Xingyue L).
After the vehicle is identified, navigate to the Immobilizer or PEPS (Passive Entry Passive Start) / BCM (Body Control Module) system. The exact name may vary slightly by software version.

Step 3: Initiate the Key Programming Function

Within the selected module, look for Special Functions or Security Access.
Select Key Addition (or "Add Key", "Program Smart Key"). Avoid selecting "All Keys Lost" unless you have no working keys.

Step 4: Retrieve the Security Access Code

The X431 will prompt you to enter the vehicle’s security access code (also called a security PIN or password).
Select Obtain Code or Security Code Retrieval. The tool will connect to its online database.
You may be prompted to enter the vehicle VIN and/or a specific code from the tool.
The security code will be displayed on the screen. Write it down or take a screenshot.

Step 5: Program the New Key

Enter the security code when prompted by the X431.
The tool will instruct you to place the new key in the key programming area. This is typically the center console cup holder or a specific spot near the start/stop button. Place the key there.
Follow the on-screen instructions. This may involve pressing the START/STOP button or a combination of button presses on the keys.
The X431 will attempt to write the key data to the vehicle’s module.
The process usually takes 30–60 seconds. Do not remove the key, turn off the ignition, or disconnect the tool during this time.

Step 6: Verify the New Key

Once the process is complete, the X431 will display "Key Added Successfully" or similar.
Remove the new key from the programming location.
Test all functions: lock/unlock doors, remote start (if equipped), and the ability to start the engine.
Confirm that all previously existing keys still work correctly.

Troubleshooting Common Issues

Even with careful execution, you may encounter problems. Here are solutions to the most frequent issues.

Issue 1: LAUNCH X431 Cannot Connect to Vehicle

Check the OBD-II Connection: Ensure the diagnostic cable is firmly plugged in. Try a different OBD-II connector if your X431 model uses interchangeable heads.
Verify Ignition Status: The ignition must be ON. For hybrid models, ensure the READY mode is active (if applicable), which is sometimes different from just "IGN ON".
Power Cycle the Tool: Close the diagnostic software, turn off the X431 tablet, and restart it.
Update the Software: Go to the Update center on the X431 and download the latest Geely software package.

Issue 2: Security Code Retrieval Fails

Check Internet Connection: The X431 requires a stable Wi-Fi or mobile data connection to retrieve the code.
Verify VIN: A single digit error in the VIN will prevent code retrieval. Double-check it.
Use Manual Code Entry: If automatic retrieval fails, you may need to obtain the security code directly from the vehicle’s ECU or from a paid third-party service. Some Geely models display a 4-digit code on the instrument cluster during a specific key-on sequence (try: turn ignition OFF, then ON three times quickly, leaving it ON). Record that code and enter it manually.
Check Subscription Status: Ensure your X431 account has an active online code retrieval subscription.

Issue 3: "Key Addition" Option is Grayed Out or Missing

Software Version: Your X431 software may be outdated for the Monjaro. Perform a full update.
Incorrect Module: Try entering the BCM (Body Control Module) instead of the Immobilizer module. Sometimes the key programming path is nested differently.
Vehicle Compatibility: Confirm your X431 explicitly supports the Geely Monjaro (Xingyue L) model year and body style.

Issue 4: Key Programming Fails Mid-Process

Incorrect Security Code: If you entered a manual code, it may be wrong. The X431 will likely display an "Incorrect PIN" error. Re-verify and obtain the correct code.
Key Not in Programming Area: Ensure the new key is placed exactly in the center console cup holder or the designated spot. Some models require the key to be in a specific orientation.
Battery Interference: Remove any metal objects, coins, or other keys from the cup holder that could interfere with the RFID signal.
Weak Key Battery: Although rare for a new key, try a different new key fob.

Issue 5: New Key Works for Lock/Unlock but Not Starting the Engine

This usually indicates the key was only partially programmed (immobilizer chip not recognized).
Repeat the process from Step 5, ensuring the vehicle is in a state that allows immobilizer learning. Sometimes turning the ignition OFF and ON again between attempts helps.

Frequently Asked Questions (FAQ)

How many keys can I program to a Geely Monjaro?

The vehicle usually supports up to 4 to 8 smart keys, depending on the system configuration. The X431 will typically show the current number of programmed keys before you add a new one.

Can I program a used or second-hand key?

Yes, but the key must be erased or "blanked" first. Used keys retain data from their previous vehicle. Some LAUNCH X431 tools have a Clear Key or Erase Key function. If yours doesn't, you may need a separate key programmer or a locksmith service.

Do I need a locksmith, or can I DIY this?

If you have the LAUNCH X431 and the necessary software, this is a DIY-capable procedure for Key Addition. However, if you have no working keys (All Keys Lost scenario), professional locksmith assistance is strongly recommended due to security protocols.

What is the difference between "Key Addition" and "All Keys Lost"?

Key Addition: Adds a new key while keeping all currently programmed keys working. Requires at least one existing master key.
All Keys Lost: Erases all old keys and programs one or more new keys from scratch. This is a more complex process that may require special authorization from Geely or a direct gateway connection.

How long does the security code retrieval take?

Typically 30 seconds to 2 minutes if the X431 has an active internet connection and the vehicle is supported by the database. Manual code entry is instant.

What if the LAUNCH X431 freezes during programming?

Do not turn off the vehicle or disconnect the tool immediately. Try to wait 1–2 minutes for the process to time out. If it remains frozen, carefully power cycle the X431 tablet (hold power button), then re-establish the connection and check the key status. The tool may have completed the write before the freeze.

Is it safe to program a key on a Geely Monjaro?

Yes, when using a professional tool like the LAUNCH X431, the process is safe. The tool handles the communication correctly. Avoid using cheap, generic OBD tools, as they can corrupt the vehicle's module data.

Do I need to cut the physical key blade first?

Yes. For the key to unlock the doors physically (if the battery dies), the metal emergency key must be cut to your vehicle's lock pattern. This is done separately by a locksmith or using a key-cutting machine.

Can I program a key while the car is running?

No. The ignition must be ON (engine off). The vehicle's immobilizer system must be in a diagnostic state, not in a driving state.

What if the X431 says "Unsupported Function"?

This means your X431 software or hardware version does not cover the specific Monjaro model or year. Contact LAUNCH support or a local distributor to check for a software update or hardware upgrade path.

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/

Geely Monjaro Key Programming with LAUNCH X431 | Step-by-Step Guide