J2534 Issues on WiTECH 2.0 - Key Programming on 2023+ Mopar / Stellantis Vehicles

Overview - J2534 issues on WiTECH 2.0 for 2023+ vehicles

There is a common issue with WiTECH 2.0 on the J2534 platform that you can avoid. This issue is not standard on vehicles manufactured before 2023 and may vary by make and model, but it consistently affects 2023 and newer Mopar / Stellantis vehicles. The most common symptom is a key programming attempt that fails with a "Negative Response 0x22" error after the RFH (Radio Frequency Hub) module verifies the rolling PIN.

In one observed case, a technician was trying to program a new key fob for a 2023 RAM ProMaster (3.6L V6 24V VVT). After entering the vehicle PIN and reaching the "Enable KEYs/FOBIKs" screen, the RFH module verified the rolling PIN as expected, but instead of continuing with key programming, WiTECH 2.0 returned "Negative Response 0x22 Press Continue." Although this specific issue was resolved by replacing the RFH module, the same error can also occur when programming keys with a J2534 device on 2023+ vehicles - meaning a faulty module is not always the cause. The J2534 hardware/software stack itself is part of the problem.

Why WiTECH 2.0 J2534 fails on 2023+ Mopar / Stellantis vehicles

These failures have appeared due to the latest security updates from Mopar. Newer Mopar / Stellantis vehicles use an improved security module architecture that is only fully accessible through an OEM pass-through device. Due to this latest security module architecture, the WiTECH 2.0 J2534 software and some hardware have not updated to support the new protocols.

Because developers have to reverse engineer these new protocols, there is no ETA for when J2534 devices will be able to reliably program these newer vehicles. As of today, developers have yet to reverse engineer the problem to find a solution - no ETA is available.

In short: the WiTECH 2.0 J2534 stack works fine on pre-2023 vehicles, but on 2023+ Mopar / Stellantis vehicles it cannot consistently complete key programming because of the new security architecture, and there is no fixed timeline for J2534 support.

How to resolve key programming issues on 2023+ Mopar / Stellantis vehicles

The current solution is to avoid using J2534 hardware on 2023+ vehicles and switch to OEM hardware with a NASTF rolling PIN from StellantisIOP.com. Follow the steps below in order to complete a key programming job on a 2023 or newer Mopar / Stellantis vehicle:

- Confirm the vehicle is 2023 or newer pre-2023 vehicles should not be affected by this issue and can continue to be programmed with your existing WiTECH 2.0 J2534 setup.
- Do not assume the RFH module is faulty by default. In the example above, replacing the RFH module resolved that specific vehicle, but the same error also occurs on healthy modules due to the J2534 limitation. Rule out the J2534 platform before replacing parts.
- Switch to OEM hardware - use the MDP (Mopar Diagnostic Pod) or MDP+ (Mopar Diagnostic Pod Plus). The MDP+ is the latest model after the MDP and is the recommended choice going forward.
- Pull your key codes (rolling PIN) through StellantisIOP.com under "Key Codes" using your NASTF credentials.
- Use the NASTF rolling PIN code from the StellantisIOP.com platform when programming the key on the vehicle.
- Continue using your existing WiTECH 2.0 J2534 setup for older (pre-2023) vehicles where it still works reliably.

AETools will submit any updates received on this matter and update the content as J2534 support catches up to the new Mopar / Stellantis security architecture.

Need help or have a question?

If you have any questions or require further assistance with key programming on 2023+ Mopar / Stellantis vehicles, WiTECH 2.0 J2534 errors, or moving to MDP / MDP+ OEM hardware, contact AETools:

- Support portal: https://support.aetools.us