Mechanic Wiki: How to Program a Chery Tiggo 8 Pro Spare Key with LAUNCH X431

Learn how to program a spare key for a Chery Tiggo 8 Pro using a LAUNCH X431 scanner. Step-by-step guide with PIN code reading, key learning, and troubleshooting tips.

Published: June 15, 2026

Quick Answer: How to Program a Chery Tiggo 8 Pro Spare Key with LAUNCH X431

To program a spare key for a Chery Tiggo 8 Pro using a LAUNCH X431, you must first read the vehicle’s immobilizer PIN code from the ECU. Connect the scanner to the OBD-II port, navigate to the Immobilizer (IMMO) menu, and select “Read PIN Code.” For an “All Keys Lost” situation, you will also need an online security seed (paid via the X431 platform). Once the PIN is obtained, erase all existing keys, then learn the new key by inserting it into the ignition (or holding it near the start button) until the IMMO light goes out. Always verify that the engine starts and the remote functions work.

Introduction

Losing the only key to a modern Chinese SUV like the Chery Tiggo 8 Pro can feel like a major headache. The cost of a dealer visit often runs into hundreds of dollars, and scheduling an appointment can take days. But here’s the good news: with the right diagnostic tool, you can handle this job yourself.

The LAUNCH X431 is a professional-grade scanner widely used by independent workshops. It gives you direct access to the vehicle’s immobilizer system, allowing you to extract the PIN code, erase lost keys, and program new ones. Whether you have one working key left or you’ve lost them all, the process is straightforward if you follow the steps correctly.

What you’ll need before starting:

A LAUNCH X431 scanner (PAD VII, X431 V+, or similar) with updated Chery software
A stable internet connection (the X431 communicates with remote servers for security seeds)
A new, unprogrammed blank key matched to your Chery’s frequency (typically 433 MHz)
Your vehicle’s VIN number
A battery charger (optional but highly recommended to avoid voltage drops)

Assessing Your Situation: Do You Have a Working Key?

Before diving into the procedure, figure out which scenario you’re dealing with. This determines whether you’ll need just a PIN read or a full online security seed.

Scenario A: You Have One Working Key

If you still have a functioning key, the process is simpler. The LAUNCH X431 can read the PIN directly from the ECU without needing an online security seed. You’ll use the “Add Key” function, and the new key will be learned alongside the existing one. Difficulty: low.

Scenario B: You’ve Lost All Keys

This is the more challenging case. The vehicle’s ECU is locked – it won’t accept a new key until you clear the memory and perform an “All Keys Lost” procedure. The LAUNCH X431 will need to request an online security seed from the manufacturer’s server, which typically costs 1–3 credits (roughly $5–$15). Without that seed, you cannot proceed. Difficulty: high, but still doable with the right scanner.

Step 1: Connecting the LAUNCH X431 and Reading the PIN Code

The immobilizer PIN code is the gateway to key programming. Here’s how to extract it.

Prerequisites: Make sure your X431 has the latest Chery software installed. Check for updates before connecting to the vehicle.

Procedure:

Connect the X431 to the vehicle’s OBD-II port. On the Chery Tiggo 8 Pro, this port is located under the driver’s side dashboard, near the fuse box.
Turn the ignition ON. Do not start the engine.
On the X431, select Diagnostics → Chery → Tiggo 8 Pro.
Navigate to Immobilizer (IMMO) or BCM (Body Control Module). The exact menu name may vary slightly by software version.
Select Read PIN Code or Read Security Code.

The X431 will communicate with the ECU and display a 4-digit or 5-digit number. Write this down carefully. That’s your PIN.

If “Read PIN Code” fails: Don’t panic. Go to Special Functions → Online Security Access. The tool will request a security seed from the LAUNCH server. This step requires an active internet connection and a small credit purchase. Once the seed is received, the PIN will be displayed.

Step 2: Erasing Old Keys (Required for “All Keys Lost” Scenarios)

If you’ve lost all keys, you must first clear the vehicle’s memory of any previously stored key IDs. The ECU can remember up to four keys, and if you skip this step, the new key may not be accepted.

Procedure:

Stay in the IMMO menu.
Select Key Programming → Erase All Keys.
Confirm the action when prompted. The vehicle will momentarily disconnect from the scanner – don’t touch anything.
Wait for the screen to show “Erasing Complete” or “No Keys Learned.”
Important: Keep the ignition ON and the X431 connected the entire time.

If you have one working key: You can skip this step and use the “Add Key” function instead. However, erasing all keys and then re-learning both the old and new key is a cleaner approach – it ensures no glitches down the road.

Step 3: Programming the New Spare Key

Now the real work begins. The method varies slightly depending on whether your Tiggo 8 Pro has a traditional key ignition or a push-to-start button.

Method A: Standard Keyed Ignition

Select Learn Key or Program Key from the IMMO menu.
Insert the new blank key into the ignition.
Turn the key to the ON position (dashboard lights up, engine off).
Watch the instrument cluster. You should see the immobilizer warning light (a car with a key icon) flash briefly, then turn solid. You may also hear a soft chime.
The X431 will display a confirmation message: “Key Learned Successfully.”
Remove the key and repeat if you are programming multiple keys.

Method B: Push-to-Start (Keyless Entry)

Push-to-start systems use an RFID reader embedded near the start button or center console. The procedure is slightly different.

Select Learn Key from the IMMO menu.
Hold the new key fob directly against the start button. Some Chery models require you to place the fob in a specific spot – check your owner’s manual or the X431 on-screen hint (often the cup holder area).
Press the start button firmly with the fob in place.
The car should recognize the transponder chip. The IMMO light will go out.
Keep the fob held there for 30–60 seconds until the X431 confirms success.

Pro tip: If the first attempt fails, try rotating the fob slightly – the RFID chip location inside the fob can matter.

Step 4: Verification and Final Steps

Programming isn’t complete until you test everything. Here’s a quick checklist.

Engine start: Remove the old or test key, insert the new key (or press the start button with the fob inside the car), and crank the engine. It should start without hesitation.
Remote functions: Lock, unlock, and pop the trunk. If the engine starts but the remote doesn’t work, the remote module needs separate programming. Go to BCM → Remote Key and select “Program Remote.” Follow the on-screen prompts.
Multiple keys: If you erased all keys earlier, you must now program all keys you want to use (both the original and the new one). Repeat Step 3 for each key in sequence.

Troubleshooting Common Issues

No procedure goes perfectly every time. Here are the most common roadblocks and how to fix them.

“Read PIN Failed” or “Invalid PIN”

Your X431 software may be outdated. Connect to Wi-Fi and update the Chery software package.
Try the “Online Security” function as described in Step 1.
Double-check that you entered the correct VIN when prompted.

Key learns but engine still won’t start

The blank key may be the wrong frequency or have a dead transponder chip. Verify it is an OEM or compatible blank (e.g., 4D70 chip, 433 MHz).
Check the IMMO light pattern – a rapid flash usually means the key was not recognized.

X431 disconnects mid-programming

Poor internet connection can interrupt the online security seed exchange. Move the vehicle to a spot with stronger signal.
Low battery voltage is a common culprit. Connect a battery charger or jumper pack to the car before starting the procedure.

“Connection to Server Failed”

This is a network issue, not a tool problem. Wait a few minutes and retry. If it persists, try a different internet source (e.g., mobile hotspot).

Frequently Asked Questions (FAQ)

Do I need a working key to start the process?

No. The LAUNCH X431 can perform an “All Keys Lost” procedure, but you will need an online security seed. Without any existing key, the ECU is completely locked until the seed is provided.

Is it safe to buy a blank key from eBay or Amazon for a Chery?

It’s a gamble. Make sure the key is advertised as an unprogrammed blank with the correct transponder chip (4D70) and frequency (433 MHz). Cheap keys sometimes have dead chips or wrong frequencies – if that happens, you’ll waste time and money. Stick with reputable sellers or OEM blanks.

Will this void my warranty?

Generally no. Key programming is a standard diagnostic procedure. However, if a dealer notices non-OEM diagnostic tool usage, they might blame unrelated issues on the scan. In practice, this is rare.

How much does the LAUNCH X431 software cost for this?

The Chery software is included with your X431 purchase. The online security seed may cost 1–3 credits (roughly $5–$15), depending on the model year. This is charged through the LAUNCH app.

Can I do this with a cheaper scanner?

Only if the scanner explicitly supports Chery immobilizer functions. Most generic OBD scanners cannot read PIN codes or perform online security seeds. The LAUNCH X431 is the industry standard for this job. For more on choosing the right scanner, check out our guide on [link to related guide on professional diagnostic tools].

How many keys can I program?

The ECU typically supports up to four keys. If you use the “Erase All” function, you must program all keys you want to keep in one session – including the original key if you still have it.

Conclusion

Programming a spare key for a Chery Tiggo 8 Pro using a LAUNCH X431 is a task any moderately experienced DIYer can handle. The keys are reading the PIN code and, in “All Keys Lost” scenarios, purchasing an online security seed. Once you have that PIN, the actual programming takes only a few minutes.

Final advice: Always test both the engine start (transponder chip) and the remote locking functions immediately after programming. Keep a battery charger connected throughout the procedure – a voltage drop during immobilizer learning can corrupt the process and force you to start over. If you get stuck, revisit the troubleshooting section above or consult a local automotive locksmith familiar with Chinese vehicles.

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/