Page 1 of 1
OBDX Pro VX (J2534) issues
Posted: Sun Feb 22, 2026 1:49 pm
by Volkanite
I'm a long time user of a OBDLink SX and never had problems reading DTC information from the ABS and RCM modules. I recently decided to try out a OBDX Pro VX (J2534) adapter and have problems reading DTC information from the ABS and RCM modules. FORScan gives me something like "Error reading DTC information" or something of that sort when trying to retrieve DTC information from these modules. The adapter has no problems reading HS-CAN modules, such as the PCM and others. Normally when manually (outside FORScan) reading from the ABS and RCM modules with my OBDLink SX, I have to set the protocol to ISO 9141-2 in order to communicate with these modules, and ISO 15765 to communicate with the PCM. I don't know what these numbers mean on a technical level, but I can guess that the ABS and RCM modules might be on a lower speed bus. Does anyone know why my OBDX Pro VX have problems reading the ABS and RCM modules? Is it a problem with FORScan? Or perhaps the adapter? Thank you for your time.
Re: OBDX Pro VX (J2534) issues
Posted: Sun Feb 22, 2026 6:42 pm
by oldtinfords
The OBDX website clearly shows none of the OBDX range has ISO-9141 support. The webapge for your VX also shows it wsan't developed for Ford & doesn't support all Ford protocols.The FT is the correct Ford tool but it also lacks ISO-1941
OBDX are developing a new All-in-one device that should support all protocols.
Unfortunately, device size limits what protocols can be supported & what can be fitted to the PCB, so 9141 was likely sacrificed for wifi & bluetooth for use with android devices & laptops
The vLinker FS USB is the best FTDI device at the moment. Hold of on buying another J2534 device until the OBDX Pro ALL-in-One in released or spend a lot more on an alternative product.
Re: OBDX Pro VX (J2534) issues
Posted: Sun Feb 22, 2026 7:43 pm
by Volkanite
Thank you for the very informative reply. I completely missed the list of supported protocols. And even If I did see them, like I said, I have no idea what those numbers mean on a technical level. But I do know now that ISO-9141 is one of the protocols that I should be looking for when purchasing my next scan tool. Very informative. Thanks again!