Read PSA 4A Proximity PIN Codes Through OBD with OBDSTAR X300 Classic G3 and Key SIM

OBDSTAR has expanded the capabilities of its Key SIM emulator with PSA 4A proximity PIN code calculation. For locksmiths and auto technicians handling all-keys-lost jobs on late-model Peugeot and Citroen vehicles equipped with ID4A smart keys, this means the four-digit security code can now be retrieved directly over OBD using the X300 Classic G3 paired with Key SIM — no need to remove or bench the BSI module.

Vehicles Covered by This Function

This approach applies to nearly every modern PSA platform vehicle, including:

• Peugeot: 2008, 208, 301, 3008, 308, 4008, 408, 5008, 508, Partner, Rifter, Expert, Traveller, and all E-series EVs.
• Citroen: C3, C4, C5 Series (Aircross, Picasso, Cactus, X), Berlingo, Dispatch, Jumpy, SpaceTourer, Basalt.
• DS Automobiles: DS 3, DS 5, DS 6, DS 7, DS 8, DS 9.

Step-by-Step Example: 2019 Peugeot 4008 All Keys Lost

The following is the actual workshop procedure used to extract the PIN code:

1. Connect the device: Plug the OBDSTAR G3 into the vehicle's OBD port.

2. Navigate the menu: Enter IMMO → Peugeot/Citroen, select the newest software version, then choose Read PIN Code → By Key SIM (ID4A).

3. Prepare the vehicle: Activate the hazard warning lights and press the Start button once.

4. Initialize the hardware: When prompted, connect the Key SIM adapter to the G3 host.

5. Data capture (150-second timer):

• Hold the Key SIM against the vehicle's emergency key induction slot, typically located on the steering column or center console.
• Cycle the ignition on and off between 5 and 10 times.
• Press and hold the Start button until the dashboard shows "No key detected," then release it as soon as the message disappears.

6. Retrieve the code: The X300 Classic G3 Key Programmer will calculate and display the 4-digit PIN code on screen. Save the code and move directly into key learning.

Additional Functions of the OBDSTAR Key SIM

Beyond PSA 4A PIN code reading, Key SIM serves as a versatile multi-function emulator board capable of handling:

• Toyota 4A and 8A smart key simulation for all-keys-lost situations across 8A-A8, 8A-A9, 8A-39, and 8A-AA chip types.
• Toyota DST40 and DST80 smart key and blade key simulation.
• Subaru 8A-H and DST80 key simulation.
• 46/4D data collection plus 46 PIN calculation for Porsche (2005–2010) and Hyundai/Kia vehicles.