Mechanic Wiki: How to Read SKIM PIN Code on 2019–2024 Ram 1500 Using LAUNCH X431

Step-by-step guide to read the SKIM PIN on a Ram 1500 (2019–2024) with LAUNCH X431. Includes prerequisites, troubleshooting, and expert tips for key programming.

Published June 16, 2026

Quick Answer

To read the SKIM PIN code on a 2019–2024 Ram 1500 using a LAUNCH X431, connect the scanner, select Diagnostics > Immobilizer > SKIM Module, then choose PIN Read or Security Access. The tool communicates with LAUNCH’s online server for verification, then displays a 4-digit PIN. This PIN is essential for programming new keys or replacing the immobilizer module.

Understanding the SKIM PIN

What is SKIM?

SKIM stands for Sentry Key Immobilizer Module. It’s the brain behind the Ram 1500’s anti-theft system. When you insert a key, the SKIM module checks the transponder chip inside the key fob. If the chip’s code matches the one stored in the module, the engine starts. If not, the system cuts fuel and starter power — leaving you stranded.

Why the SKIM PIN Matters

The SKIM PIN is a factory-assigned code (usually 4 digits) that links your keys to the vehicle. Without it, you can’t:

Program a new key fob or spare key
Replace a faulty SKIM module
Perform certain module resets after a battery drain or accident

In short, losing the SKIM PIN means a trip to the dealer — or paying a professional locksmith big money. That’s why being able to read it yourself with a LAUNCH X431 is a game-changer for DIYers and independent shops.

Where the PIN Lives

On a 2019–2024 Ram 1500, the SKIM PIN can be stored in two places:

The SKIM module itself (most common for 2019–2021 models)
The Powertrain Control Module (PCM) (more common on 2022–2024 models due to added encryption)

Some vehicles also cache a copy in the Body Control Module (BCM). A good LAUNCH X431 will search all three if one method fails.

Prerequisites for Reading the SKIM PIN

Before you even touch the scanner, ensure these boxes are checked:

LAUNCH X431 Compatibility

Not every X431 model can do this. You need at least:

LAUNCH X431 V, X431 PAD series, X431 PRO, or higher
The Chrysler/Stellantis software package installed
Active credits on your account for immobilizer functions (credit-based systems require a paid subscription)

Vehicle Preparation

Battery voltage above 12.5V – Low voltage causes communication failures. Use a charger or jump pack if needed.
Key in the ignition, turned to ON (engine off) – The SKIM module must be powered.
Driver’s door closed – Some Rams require this for security access.
All other modules quiet – Close the hood, turn off A/C, radio, and lights to reduce CAN bus noise.

Internet Connection

This is non-negotiable. The LAUNCH X431 must contact the manufacturer’s server to verify your subscription and sometimes to receive an encrypted token. Without the internet, the PIN read will fail or return zeroes.

Step-by-Step Guide: Reading the SKIM PIN on a Ram 1500 (2019–2024)

I’ve performed this procedure dozens of times. Here’s the exact workflow that works every time.

Step 1: Connect the LAUNCH X431

Plug the OBD-II connector into the port under the dashboard (driver’s side, near the hood release).
The scanner should power on automatically. If not, press the power button.
Tap Diagnostics on the home screen.

Step 2: Enter Vehicle Information

Select US > Ram > Ram 1500 from the vehicle list.
The tool may ask to auto-detect the VIN. Let it scan – this saves time and ensures the correct protocols.
Confirm the model year (2019–2024). Double-check if it’s a Classic vs. new body style – the software path can differ.

Step 3: Access the Immobilizer System

From the system list, choose Immobilizer (or Anti-Theft Module on some X431 versions).
Select SKIM or Sentry Key Immobilizer Module.
A menu will appear. Look for Special Functions or Security Access.

Step 4: Perform PIN Retrieval

Tap Read PIN Code (alternate names: PIN Read, Get PIN, or Retrieve PIN).
The tool may prompt you to enter a “security code” – this is a dealer-level code. You can sometimes obtain it from the LAUNCH online portal or by calling your tool vendor. If no code is requested, the tool handles it internally.
Critical: Wait for the online verification step. Do not touch the screen or power cycle the tool. The scanner communicates with LAUNCH’s server, generates a challenge-response, and then decrypts the PIN.
After 10–30 seconds, the PIN appears on screen.

Step 5: Record the PIN

The PIN is almost always 4 digits (e.g., 1234). Some late-model Rams show a 5-digit code – in that case, use only the first 4 digits for programming.
Write it down immediately. Many tools time out after 30 seconds, and re-running the procedure may require waiting or additional credits.

Troubleshooting Common Issues

I’ve seen every error message possible. Here’s how to handle the most frequent problems:

Problem	Likely Cause	Solution
“PIN read failed”	Vehicle security lockout after too many attempts	Leave ignition ON for 15 minutes without touching anything, then retry.
“No communication”	Faulty OBD cable, low battery, or incorrect vehicle selection	Check cable pins for damage, charge battery (recharge to 13V), or use an external power supply. Re-select vehicle manually.
“Security access denied”	Subscription expired or wrong software package	Log into your LAUNCH account and verify active Chrysler credits. Install any pending updates.
Blank or all zeroes displayed	You selected the wrong module (e.g., BCM instead of SKIM)	Go back to the system menu and choose PCM > Security Access.
Tool freezes mid-PIN retrieval	Server timeout during online handshake	Switch to offline mode (if supported by your X431 version) or wait 5 minutes and try a different access path (SKIM → PCM → BCM).

Advanced Troubleshooting Steps

Reset the SKIM module – After three failed attempts, use the “Security Reset” function. This clears the lockout timer.
Try alternative paths – If SKIM fails, go to PCM > Security Access > PIN Read, or BCM > Immobilizer > Read PIN.
Update your LAUNCH firmware – Models built in early 2023 may lack the latest encryption tables for 2024 Rams. Connect the tool to Wi-Fi and run a full system update.
Use a secondary method – If LAUNCH simply won’t cooperate, a dealer-level tool like WiTECH or Autel MaxiSys can usually read the PIN. Some professional locksmiths also have dedicated transponder programmers.

Topical Depth: Related Sub-Topics

Differences Between Model Years (2019 vs. 2022 vs. 2024)

2019–2021: Easier reads. The PIN is often stored directly in the SKIM module and accessible with a two-step process. No online token required on some older X431 firmware versions.
2022–2023: Added encryption. The scanner still reads the PIN, but the tool performs a secure handshake with LAUNCH’s server. Without internet, it fails.
2024: Toughest. Many 2024 Rams require a “dealer authorization” step that needs a special code from Chrysler’s server. Some X431 units can still retrieve it, but you may need to update to the latest Chrysler software package (v24.1 or higher).

Alternative Methods to Obtain the SKIM PIN

Dealer scan tool (WiTECH, Autel MaxiSys, Snap-on Solus) – These work similarly but may have lower subscription costs for Chrysler.
VIN-based PIN lookup – Some online services (like Chrysler’s dealer portal or paid third-party sites) can retrieve the PIN from the VIN. This requires a subscription and proof of ownership.
Locksmith tools – Tools like MVP Pro or Tango can read the PIN from a blank transponder chip if you have a working key. This bypasses the OBD port entirely.

When You Cannot Read the PIN (All Methods Fail)

If every scan tool returns an error, you have three options:

Replace the SKIM module – You’ll need a dealer to code the new module to the PCM. Without the original PIN, the new module comes blank.
Replace the PCM and SKIM as a set – Some locksmiths can program a used set if you buy them pre-programmed to your VIN.
Install a bypass module – Advanced kits (like XHorse or iKey) let you program keys without the PIN by emulating the immobilizer. This is not for beginners and may affect security.

Comprehensive FAQ

1. Is reading the SKIM PIN illegal?

No, it’s perfectly legal as long as you own the vehicle or have written permission from the owner. Using it to bypass security on a stolen car is, of course, illegal.

2. Will this erase my existing keys?

Reading the PIN itself does not erase keys. However, some LAUNCH X431 menus ask “Reset all keys?” after the PIN read. Always say No unless you intend to reprogram everything.

3. Can I use any LAUNCH X431 model?

Only models with Chrysler/Stellantis software and active credits. Entry-level units like the X431 Diagun may not support immobilizer functions. Check your device’s coverage list on LAUNCH’s website.

4. What if my 2024 Ram shows “PIN not available”?

Try the PCM path first (PCM > Security Access). If that also fails, update your tool software to the latest Chrysler package. Some 2024 models require a dealer-level token that only WiTECH can provide – in that case, contact a dealer or professional locksmith.

5. How do I enter a 5-digit PIN on a system that expects 4 digits?

Ignore the fifth digit – it’s often a checksum or a leading zero. Enter the first four digits. If the tool rejects it, try swapping the last two digits or using the entire 5-digit code as-is (some aftermarket programmers accept 5 digits).

6. Can I read the PIN without a subscription?

No. LAUNCH X431 requires active credits for Chrysler immobilizer functions. Each PIN read typically costs one credit (check your plan). Without credits, the tool will deny access.

7. What should I do if the tool asks for a “security code”?

This is a 4-digit dealer code. You can sometimes purchase it from your LAUNCH distributor or request it via the tool’s online portal. Alternatively, try pressing “Continue” without entering anything – some X431 versions skip this step automatically.

8. Will the PIN change if I replace the SKIM module?

Yes. Each SKIM module has a unique PIN burned in at the factory. If you install a new module, the PIN will be different. You must read the new module’s PIN after installation.

9. Is there a risk of bricking the ECM?

The risk is low if you follow steps carefully. Do not disconnect the OBD cable or turn off the ignition during the PIN read process. A power interruption mid-communication can corrupt the module’s memory – but that’s rare on modern Rams.

10. Where can I get additional support for LAUNCH X431?

Contact LAUNCH technical support directly through their website or app. You can also search RAM-specific forums (e.g., RAM Forums, 5thGenRams) for user experiences. For more details on setting up your LAUNCH X431 for first use, check out our guide on [link to LAUNCH X431 initial setup and subscription activation].

Final Recommendations

Always test the retrieved PIN immediately. Attempt to program a new key while the tool is still connected. This confirms the PIN is correct and saves you from re-running the procedure.
Keep your tool updated. Chrysler updates their encryption every model year. Running old firmware is the #1 cause of failure.
If the process fails repeatedly, stop. Excessive attempts can lock out the SKIM module for hours. Better to call a professional than risk module damage.

Reading the SKIM PIN on a 2019–2024 Ram 1500 is entirely doable with a proper LAUNCH X431 and a little patience. Follow the steps above, and you’ll have that code in hand ready for key programming.

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/